<s>
The	O
MacBook	B-Device
Pro	I-Device
is	O
a	O
line	O
of	O
Mac	B-Device
laptops	B-Device
made	O
by	O
Apple	O
Inc	O
.	O
</s>
<s>
Introduced	O
in	O
January	O
2006	O
,	O
it	O
is	O
the	O
higher-end	O
lineup	O
in	O
the	O
MacBook	B-Device
family	I-Device
,	O
sitting	O
above	O
the	O
consumer-focused	O
MacBook	B-Device
Air	I-Device
.	O
</s>
<s>
It	O
is	O
currently	O
sold	O
with	O
13-inch	O
,	O
14-inch	O
,	O
and	O
16-inch	O
screens	O
,	O
all	O
using	O
Apple	B-Device
silicon	I-Device
M-series	O
chips	O
.	O
</s>
<s>
The	O
original	O
MacBook	B-Device
Pro	I-Device
used	O
the	O
design	O
of	O
the	O
PowerBook	B-Operating_System
G4	I-Operating_System
,	O
but	O
replaced	O
the	O
PowerPC	B-General_Concept
G4	I-General_Concept
chips	O
with	O
Intel	B-Device
Core	I-Device
processors	O
,	O
added	O
a	O
webcam	B-Protocol
,	O
and	O
introduced	O
the	O
MagSafe	O
power	O
connector	O
.	O
</s>
<s>
Later	O
revisions	O
added	O
Intel	B-Device
Core	I-Device
2	I-Device
Duo	O
processors	O
and	O
LED-backlit	O
displays	O
.	O
</s>
<s>
Called	O
the	O
"	O
unibody	O
"	O
model	O
because	O
its	O
case	O
was	O
machined	O
from	O
a	O
single	O
piece	O
of	O
aluminum	O
,	O
it	O
had	O
a	O
thinner	O
flush	O
display	O
,	O
a	O
redesigned	O
trackpad	B-Application
whose	O
entire	O
surface	O
consisted	O
of	O
a	O
single	O
clickable	O
button	O
,	O
and	O
a	O
redesigned	O
keyboard	O
.	O
</s>
<s>
Updates	O
brought	O
Intel	B-Device
Core	I-Device
i5	I-Device
and	O
i7	B-Device
processors	O
and	O
introduced	O
Intel	O
's	O
Thunderbolt	B-Protocol
.	O
</s>
<s>
The	O
Retina	B-Operating_System
MacBook	B-Device
Pro	I-Device
was	O
released	O
in	O
2012	O
:	O
the	O
15-inch	O
in	O
June	O
,	O
a	O
13-inch	O
model	O
in	O
October	O
.	O
</s>
<s>
It	O
is	O
thinner	O
than	O
its	O
predecessor	O
,	O
made	O
solid-state	O
storage	O
(	O
SSD	B-Device
)	O
standard	O
,	O
added	O
HDMI	B-Protocol
,	O
and	O
included	O
a	O
high-resolution	O
Retina	B-Operating_System
display	I-Operating_System
.	O
</s>
<s>
It	O
eliminated	O
Ethernet	O
and	O
FireWire	B-Protocol
ports	I-Protocol
and	O
the	O
optical	O
drive	O
.	O
</s>
<s>
The	O
Touch	O
Bar	O
MacBook	B-Device
Pro	I-Device
,	O
released	O
in	O
October	O
2016	O
,	O
adopted	O
USB-C	O
for	O
all	O
data	O
ports	O
and	O
power	O
and	O
included	O
a	O
shallower	O
"	O
butterfly	O
"	O
-mechanism	O
keyboard	O
.	O
</s>
<s>
On	O
all	O
but	O
the	O
base	O
model	O
,	O
the	O
function	B-Application
keys	I-Application
were	O
replaced	O
with	O
a	O
touchscreen	O
strip	O
called	O
the	O
Touch	O
Bar	O
with	O
a	O
Touch	O
ID	O
sensor	O
integrated	O
into	O
the	O
power	O
button	O
.	O
</s>
<s>
A	O
November	O
2019	O
revision	O
to	O
the	O
Touch	O
Bar	O
MacBook	B-Device
Pro	I-Device
introduced	O
the	O
Magic	O
Keyboard	O
,	O
which	O
uses	O
a	O
scissor-switch	O
mechanism	O
.	O
</s>
<s>
Therefore	O
,	O
now	O
it	O
is	O
put	O
as	O
a	O
whole	O
button	O
as	O
it	O
was	O
standard	O
before	O
Touch	O
Bar	O
Macs	B-Device
.	O
</s>
<s>
Another	O
revision	O
to	O
the	O
Touch	O
Bar	O
MacBook	B-Device
Pro	I-Device
was	O
released	O
in	O
November	O
2020	O
;	O
it	O
was	O
the	O
first	O
MacBook	B-Device
Pro	I-Device
to	O
feature	O
an	O
Apple-designed	B-Device
system	I-Device
on	I-Device
a	I-Device
chip	I-Device
,	O
the	O
Apple	B-Device
M1	I-Device
.	O
</s>
<s>
The	O
14-inch	O
and	O
16-inch	O
MacBook	B-Device
Pros	I-Device
were	O
released	O
in	O
October	O
2021	O
.	O
</s>
<s>
Powered	O
by	O
either	O
M1	B-Device
Pro	I-Device
or	I-Device
M1	I-Device
Max	I-Device
chips	I-Device
,	O
they	O
are	O
the	O
first	O
to	O
be	O
available	O
only	O
with	O
an	O
Apple	B-Device
silicon	I-Device
system	O
on	O
a	O
chip	O
.	O
</s>
<s>
These	O
models	O
re-introduced	O
MagSafe	O
,	O
function	B-Application
keys	I-Application
,	O
and	O
some	O
other	O
elements	O
that	O
had	O
been	O
removed	O
from	O
the	O
Touch	O
Bar	O
MacBook	B-Device
Pro	I-Device
.	O
</s>
<s>
Alongside	O
the	O
redesigned	O
M2	O
MacBook	B-Device
Air	I-Device
,	O
Apple	O
refreshed	O
the	O
14	O
-	O
and	O
16-inch	O
MacBook	B-Device
Pros	I-Device
with	O
the	O
Apple	B-Device
M2	I-Device
chip	O
.	O
</s>
<s>
The	O
model	O
features	O
the	O
same	O
chassis	O
,	O
albeit	O
with	O
changes	O
to	O
the	O
system	O
audio	O
:	O
speakers	O
compatible	O
with	O
Spatial	O
Audio	O
and	O
a	O
headphone	B-Device
jack	I-Device
with	O
support	O
for	O
high-impedance	O
headphones	O
.	O
</s>
<s>
The	O
original	O
MacBook	B-Device
Pro	I-Device
used	O
the	O
design	O
of	O
the	O
PowerBook	B-Operating_System
G4	I-Operating_System
,	O
but	O
replaced	O
the	O
PowerPC	B-General_Concept
G4	I-General_Concept
chips	O
with	O
Intel	B-Device
Core	I-Device
processors	O
,	O
added	O
a	O
built-in	O
iSight	B-Protocol
camera	I-Protocol
,	O
and	O
introduced	O
the	O
MagSafe	O
power	O
connector	O
.	O
</s>
<s>
The	O
optical	O
drive	O
was	O
shrunk	O
to	O
fit	O
into	O
the	O
slimmer	O
MacBook	B-Device
Pro	I-Device
;	O
it	O
runs	O
slower	O
than	O
the	O
optical	O
drive	O
in	O
the	O
PowerBook	B-Operating_System
G4	I-Operating_System
and	O
cannot	O
write	O
to	O
dual-layer	O
DVDs	O
.	O
</s>
<s>
In	O
2007	O
,	O
the	O
15-inch	O
model	O
added	O
Intel	B-Device
Core	I-Device
2	I-Device
Duo	O
processors	O
,	O
and	O
LED-backlit	O
displays	O
,	O
and	O
17-inch	O
did	O
in	O
2008	O
.	O
</s>
<s>
The	O
2007	O
revision	O
received	O
new	O
Nvidia	O
Geforce	O
8600M	O
GT	O
video	O
cards	O
and	O
the	O
2008	O
revision	O
upgraded	O
the	O
processors	O
to	O
"	B-Device
Penryn	I-Device
"	O
cores	O
while	O
adding	O
multi-touch	B-Application
capabilities	O
to	O
the	O
trackpad	B-Application
.	O
</s>
<s>
Both	O
the	O
original	O
15	O
-	O
and	O
17-inch	O
model	O
MacBook	B-Device
Pro	I-Device
computers	O
come	O
with	O
ExpressCard/34	B-Device
slots	O
,	O
which	O
replace	O
the	O
PC	B-Architecture
Card	I-Architecture
slots	O
found	O
in	O
the	O
PowerBook	B-Operating_System
G4	I-Operating_System
.	O
</s>
<s>
Initial	O
first-generation	O
15-inch	O
models	O
retain	O
the	O
two	O
USB	B-Protocol
2.0	O
ports	O
and	O
a	O
FireWire	B-Protocol
400	O
port	O
but	O
drop	O
the	O
FireWire	B-Protocol
800	O
,	O
until	O
it	O
was	O
readded	O
in	O
a	O
later	O
revision	O
.	O
</s>
<s>
The	O
17-inch	O
models	O
have	O
an	O
additional	O
USB	B-Protocol
2.0	O
port	O
,	O
as	O
well	O
as	O
the	O
FireWire	B-Protocol
800	O
port	O
missing	O
from	O
the	O
initial	O
15-inch	O
models	O
.	O
</s>
<s>
Models	O
of	O
the	O
MacBook	B-Device
Pro	I-Device
built	O
from	O
2007	O
to	O
early	O
2008	O
(	O
15	O
"	O
)	O
/	O
late	O
2008	O
(	O
17	O
"	O
)	O
using	O
the	O
Nvidia	O
8600M	O
GT	O
chip	O
reportedly	O
exhibited	O
failures	O
in	O
which	O
the	O
GPU	B-Architecture
die	O
would	O
detach	O
from	O
the	O
chip	O
carrier	O
,	O
or	O
the	O
chip	O
would	O
detach	O
from	O
the	O
logic	O
board	O
.	O
</s>
<s>
NVIDIA	O
also	O
confirmed	O
the	O
issue	O
,	O
and	O
previously	O
manufactured	O
replacement	O
GPUs	B-Architecture
,	O
which	O
some	O
users	O
have	O
replaced	O
themselves	O
.	O
</s>
<s>
On	O
October	O
14	O
,	O
2008	O
,	O
in	O
a	O
press	O
event	O
at	O
company	O
headquarters	O
,	O
Apple	O
officials	O
announced	O
a	O
new	O
15-inch	O
MacBook	B-Device
Pro	I-Device
featuring	O
a	O
"	O
precision	O
aluminum	O
unibody	O
enclosure	O
"	O
and	O
tapered	O
sides	O
similar	O
to	O
those	O
of	O
the	O
MacBook	B-Device
Air	I-Device
.	O
</s>
<s>
Designers	O
shifted	O
the	O
MacBook	B-Device
Pro	I-Device
's	O
ports	O
to	O
the	O
left	O
side	O
of	O
the	O
case	O
,	O
and	O
moved	O
the	O
optical	O
disc	O
drive	O
slot	O
from	O
the	O
front	O
to	O
the	O
right	O
side	O
,	O
similar	O
to	O
the	O
MacBook	B-Device
.	O
</s>
<s>
The	B-Device
new	I-Device
MacBook	I-Device
Pro	O
computers	O
had	O
two	O
video	O
cards	O
that	O
the	O
user	O
could	O
switch	O
between	O
:	O
the	O
Nvidia	O
GeForce	O
9600M	O
GT	O
with	O
either	O
256	O
or	O
512MB	O
of	O
dedicated	O
memory	O
and	O
a	O
GeForce	O
9400M	O
with	O
256MB	O
of	O
shared	O
system	O
memory	O
.	O
</s>
<s>
The	O
FireWire	B-Protocol
400	O
port	O
was	O
removed	O
.	O
</s>
<s>
The	O
DVI	B-Protocol
port	I-Protocol
was	O
replaced	O
with	O
a	O
Mini	B-Protocol
DisplayPort	I-Protocol
receptacle	O
.	O
</s>
<s>
The	O
original	O
unibody	O
MacBook	B-Device
Pro	I-Device
came	O
with	O
a	O
user-removable	O
battery	O
;	O
Apple	O
claimed	O
five	O
hours	O
of	O
use	O
,	O
with	O
one	O
reviewer	O
reporting	O
results	O
closer	O
to	O
four	O
hours	O
on	O
a	O
continuous	O
video	O
battery	O
stress	O
test	O
.	O
</s>
<s>
The	O
unibody-construction	O
MacBook	B-Device
Pro	I-Device
largely	O
follows	O
the	O
styling	O
of	O
the	O
original	O
aluminum	O
iMac	B-Device
and	O
the	O
MacBook	B-Device
Air	I-Device
and	O
is	O
slightly	O
thinner	O
than	O
its	O
predecessor	O
,	O
albeit	O
wider	O
and	O
deeper	O
due	O
to	O
the	O
widescreen	O
display	O
.	O
</s>
<s>
The	O
entire	O
trackpad	B-Application
is	O
usable	O
and	O
acts	O
as	O
a	O
clickable	O
button	O
.	O
</s>
<s>
The	O
trackpad	B-Application
is	O
also	O
larger	O
than	O
that	O
of	O
the	O
aluminum	O
models	O
,	O
giving	O
more	O
room	O
for	O
scrolling	O
and	O
multi-touch	B-Application
gestures	O
.	O
</s>
<s>
When	O
the	O
line	O
was	O
updated	O
in	O
April	O
2010	O
,	O
inertial	O
scrolling	O
was	O
added	O
,	O
making	O
the	O
scrolling	O
experience	O
much	O
like	O
that	O
of	O
the	O
iPhone	B-Device
and	O
iPad	B-Device
.	O
</s>
<s>
During	O
the	O
MacWorld	O
Expo	O
keynote	O
on	O
January	O
6	O
,	O
2009	O
,	O
Phil	O
Schiller	O
announced	O
a	O
17-inch	O
MacBook	B-Device
Pro	I-Device
with	O
unibody	O
construction	O
.	O
</s>
<s>
Instead	O
of	O
traditional	O
round	O
cells	O
inside	O
the	O
casing	O
,	O
the	O
lithium-ion	O
polymer	O
batteries	O
are	O
shaped	O
and	O
fitted	O
into	O
each	O
notebook	B-Device
to	O
maximally	O
utilize	O
space	O
.	O
</s>
<s>
At	O
Apple	O
's	O
Worldwide	O
Developers	O
Conference	O
(	O
WWDC	O
)	O
on	O
June	O
8	O
,	O
2009	O
,	O
it	O
was	O
announced	O
that	O
the	O
13-inch	O
unibody	O
MacBook	B-Device
would	O
be	O
upgraded	O
and	O
re-branded	O
as	O
a	O
MacBook	B-Device
Pro	I-Device
,	O
leaving	O
only	O
the	O
white	O
polycarbonate	O
MacBook	B-Device
in	O
the	O
MacBook	B-Device
line	O
.	O
</s>
<s>
It	O
was	O
also	O
announced	O
that	O
the	O
entire	O
MacBook	B-Device
Pro	I-Device
line	O
would	O
use	O
the	O
non-user-removable	O
battery	O
first	O
introduced	O
in	O
the	O
17-inch	O
MacBook	B-Device
Pro	I-Device
.	O
</s>
<s>
The	O
updated	O
MacBook	B-Device
Pro	I-Device
13	O
-	O
and	O
the	O
15-inch	O
would	O
each	O
have	O
up	O
to	O
a	O
claimed	O
7	O
hours	O
of	O
battery	O
life	O
,	O
while	O
the	O
17-inch	O
would	O
keep	O
its	O
8-hour	O
capacity	O
.	O
</s>
<s>
Some	O
sources	O
even	O
reported	O
up	O
to	O
eight	O
hours	O
of	O
battery	O
life	O
for	O
the	O
13	O
-	O
and	O
15-inch	O
MacBook	B-Device
Pro	I-Device
computers	O
during	O
casual	O
use	O
,	O
while	O
others	O
reported	O
around	O
six	O
hours	O
.	O
</s>
<s>
Like	O
the	O
17-inch	O
MacBook	B-Device
Pro	I-Device
,	O
Apple	O
claims	O
that	O
they	O
will	O
last	O
around	O
1,000	O
charging	O
cycles	O
while	O
still	O
containing	O
80%	O
of	O
their	O
capacity	O
.	O
</s>
<s>
Graphics	O
card	O
options	O
stayed	O
the	O
same	O
from	O
the	O
previous	O
release	O
,	O
although	O
the	O
13-inch	O
and	O
the	O
base	O
model	O
15-inch	O
,	O
came	O
with	O
only	O
the	O
GeForce	O
9400M	O
GPU	B-Architecture
.	O
</s>
<s>
All	O
of	O
these	O
mid-2009	O
models	O
also	O
included	O
a	O
FireWire	B-Protocol
800	O
port	O
and	O
all	O
except	O
the	O
17-inch	O
models	O
would	O
receive	O
an	O
SD	B-Device
card	I-Device
slot	O
.	O
</s>
<s>
The	O
17-inch	O
model	O
would	O
retain	O
its	O
ExpressCard/34	B-Device
slot	O
.	O
</s>
<s>
For	O
the	O
13-inch	O
MacBook	B-Device
Pro	I-Device
,	O
the	O
Kensington	O
lock	O
slot	O
was	O
moved	O
to	O
the	O
right	O
side	O
of	O
the	O
chassis	O
.	O
</s>
<s>
In	O
August	O
2009	O
,	O
Apple	O
extended	O
the	O
"	O
matte	O
"	O
anti-glare	O
display	O
option	O
to	O
the	O
15-inch	O
MacBook	B-Device
Pro	I-Device
.	O
</s>
<s>
On	O
April	O
13	O
,	O
2010	O
,	O
Intel	B-Device
Core	I-Device
i5	I-Device
and	O
Core	B-Device
i7	I-Device
processors	O
were	O
introduced	O
in	O
the	O
15	O
-	O
and	O
17-inch	O
models	O
,	O
while	O
the	O
13-inch	O
retained	O
the	O
Core	B-Device
2	I-Device
Duo	I-Device
with	O
a	O
speed	O
increase	O
.	O
</s>
<s>
The	O
15	O
-	O
and	O
17-inch	O
models	O
also	O
have	O
an	O
integrated	O
Intel	O
GPU	B-Architecture
that	O
is	O
built	O
into	O
the	O
Core	B-Device
i5	I-Device
and	O
i7	B-Device
processors	O
.	O
</s>
<s>
Save	O
for	O
a	O
third	O
USB	B-Protocol
2.0	O
slot	O
,	O
all	O
the	O
ports	O
on	O
the	O
17-inch	O
MacBook	B-Device
Pro	I-Device
are	O
the	O
same	O
in	O
type	O
and	O
number	O
as	O
on	O
the	O
15-inch	O
version	O
.	O
</s>
<s>
Battery	O
life	O
was	O
also	O
extended	O
further	O
in	O
this	O
update	O
,	O
to	O
an	O
estimated	O
10	O
hours	O
for	O
the	O
13-inch	O
and	O
8	O
–	O
9	O
hours	O
on	O
the	O
15	O
-	O
and	O
17-inch	O
MacBook	B-Device
Pro	I-Device
computers	O
.	O
</s>
<s>
Thunderbolt	B-Protocol
technology	O
,	O
Sandy	B-Device
Bridge	I-Device
dual-core	O
Intel	B-Device
Core	I-Device
i5	I-Device
and	O
i7	B-Device
(	O
on	O
the	O
13-inch	O
model	O
)	O
or	O
quad-core	O
i7	B-Device
(	O
on	O
the	O
15	O
-	O
and	O
17-inch	O
models	O
)	O
processors	O
,	O
and	O
a	O
high-definition	O
FaceTime	B-Protocol
camera	O
were	O
added	O
on	O
February	O
24	O
,	O
2011	O
.	O
</s>
<s>
Later	O
editions	O
of	O
these	O
models	O
,	O
following	O
the	O
release	O
of	O
OS	B-Application
X	I-Application
Lion	I-Application
,	O
replaced	O
the	O
Expose	O
(	O
F3	O
)	O
key	O
with	O
a	O
Mission	O
Control	O
key	O
,	O
and	O
the	O
Dashboard	O
(	O
F4	O
)	O
key	O
with	O
a	O
Launchpad	O
key	O
.	O
</s>
<s>
The	O
Thunderbolt	B-Protocol
serial	O
bus	O
platform	O
can	O
achieve	O
speeds	O
of	O
up	O
to	O
10Gbit/s	O
,	O
which	O
is	O
up	O
to	O
twice	O
as	O
fast	O
as	O
the	O
USB	B-Protocol
3.0	O
specification	O
,	O
20	O
times	O
faster	O
than	O
the	O
USB	B-Protocol
2.0	O
specification	O
,	O
and	O
up	O
to	O
12	O
times	O
faster	O
than	O
FireWire	B-Protocol
800	O
.	O
</s>
<s>
Apple	O
says	O
that	O
Thunderbolt	B-Protocol
can	O
be	O
used	O
to	O
drive	O
displays	O
or	O
to	O
transfer	O
large	O
quantities	O
of	O
data	O
in	O
a	O
short	O
amount	O
of	O
time	O
.	O
</s>
<s>
On	O
June	O
11	O
,	O
2012	O
,	O
Apple	O
showcased	O
its	O
upgraded	O
Mac	B-Device
notebooks	B-Device
,	O
OS	B-Operating_System
X	I-Operating_System
Mountain	I-Operating_System
Lion	I-Operating_System
,	O
and	O
iOS	B-Application
6	O
at	O
the	O
Worldwide	O
Developers	O
Conference	O
(	O
WWDC	O
)	O
in	O
San	O
Francisco	O
.	O
</s>
<s>
The	B-Device
new	I-Device
MacBook	I-Device
Pro	O
models	O
were	O
updated	O
with	O
Ivy	B-Device
Bridge	I-Device
processors	O
and	O
USB	B-Protocol
3.0	O
ports	O
,	O
and	O
the	O
default	O
RAM	O
on	O
premium	O
models	O
was	O
increased	O
to	O
8GB	O
.	O
</s>
<s>
After	O
a	O
media	O
event	O
on	O
October	O
22	O
,	O
2013	O
,	O
Apple	O
discontinued	O
all	O
unibody	O
MacBook	B-Device
Pros	I-Device
except	O
for	O
the	O
entry-level	O
2.5GHz	O
13-inch	O
model	O
.	O
</s>
<s>
Apple	O
discontinued	O
the	O
13-inch	O
aluminum	O
MacBook	B-Device
Pro	I-Device
on	O
October	O
27	O
,	O
2016	O
.	O
</s>
<s>
Prior	O
to	O
its	O
discontinuation	O
it	O
was	O
Apple	O
's	O
only	O
product	O
to	O
still	O
include	O
an	O
optical	O
drive	O
and	O
a	O
FireWire	B-Protocol
port	I-Protocol
,	O
and	O
only	O
notebook	B-Device
with	O
a	O
hard	O
disk	O
drive	O
and	O
Ethernet	O
port	O
.	O
</s>
<s>
It	O
is	O
also	O
the	O
only	O
MacBook	B-Device
Pro	I-Device
to	O
support	O
9	O
versions	O
of	O
macOS	B-Application
,	O
from	O
Mac	B-Application
OS	I-Application
X	I-Application
Lion	I-Application
10.7	B-Application
through	O
macOS	B-Device
Catalina	I-Device
10.15	O
.	O
</s>
<s>
Early	O
and	O
late	O
2011	O
models	O
with	O
a	O
GPU	B-Architecture
;	O
15	O
"	O
&	O
17	O
"	O
;	O
reportedly	O
suffer	O
from	O
manufacturing	O
problems	O
leading	O
to	O
overheating	O
,	O
graphical	O
problems	O
,	O
and	O
eventually	O
complete	O
GPU	B-Architecture
and	O
logic	O
board	O
failure	O
.	O
</s>
<s>
A	O
similar	O
but	O
nonidentical	O
problem	O
affected	O
iMac	B-Device
GPUs	B-Architecture
which	O
were	O
later	O
recalled	O
by	O
Apple	O
.	O
</s>
<s>
The	O
problem	O
was	O
covered	O
by	O
many	O
articles	O
in	O
Mac-focused	O
magazines	O
,	O
starting	O
late	O
2013	O
throughout	O
2014	O
.	O
</s>
<s>
The	O
lawsuit	O
will	O
cover	O
residents	O
residing	O
in	O
both	O
California	O
and	O
Florida	O
who	O
have	O
purchased	O
a	O
2011	O
MacBook	B-Device
Pro	I-Device
notebook	B-Device
with	O
an	O
AMD	O
graphics	O
card	O
.	O
</s>
<s>
On	O
February	O
20	O
,	O
2015	O
,	O
Apple	O
instituted	O
the	O
This	O
"	O
will	O
repair	O
affected	O
MacBook	B-Device
Pro	I-Device
systems	O
,	O
free	O
of	O
charge	O
"	O
.	O
</s>
<s>
The	O
program	O
covered	O
affected	O
MacBook	B-Device
Pro	I-Device
models	O
until	O
December	O
31	O
,	O
2016	O
,	O
or	O
four	O
years	O
from	O
original	O
date	O
of	O
sale	O
.	O
</s>
<s>
The	O
Retina	B-Operating_System
MacBook	B-Device
Pro	I-Device
was	O
released	O
in	O
2012	O
,	O
marketed	O
as	O
the	O
"	O
MacBook	B-Device
Pro	I-Device
with	O
Retina	B-Operating_System
display	I-Operating_System
"	O
to	O
differentiate	O
it	O
from	O
the	O
previous	O
model	O
:	O
the	O
15-inch	O
in	O
June	O
2012	O
,	O
a	O
13-inch	O
model	O
in	O
October	O
.	O
</s>
<s>
It	O
made	O
solid-state	O
storage	O
(	O
SSD	B-Device
)	O
standard	O
,	O
upgraded	O
to	O
USB	B-Protocol
3.0	O
,	O
added	O
an	O
additional	O
Thunderbolt	B-Protocol
port	I-Protocol
,	O
added	O
HDMI	B-Protocol
,	O
and	O
included	O
a	O
high-resolution	O
Retina	B-Operating_System
display	I-Operating_System
.	O
</s>
<s>
The	O
model	O
name	O
is	O
no	O
longer	O
placed	O
at	O
the	O
bottom	O
of	O
the	O
screen	O
bezel	O
;	O
instead	O
,	O
it	O
is	O
found	O
on	O
the	O
underside	O
of	O
the	O
chassis	O
,	O
similar	O
to	O
an	O
iOS	B-Application
device	O
and	O
is	O
the	O
first	O
Macintosh	B-Device
notebook	B-Device
to	O
not	O
have	O
its	O
model	O
name	O
visible	O
during	O
normal	O
use	O
.	O
</s>
<s>
It	O
eliminated	O
Ethernet	O
,	O
FireWire	B-Protocol
800	O
ports	O
,	O
but	O
Thunderbolt	B-Protocol
adapters	O
were	O
available	O
for	O
purchase	O
,	O
Kensington	O
lock	O
slot	O
,	O
the	O
battery	O
indicator	O
button	O
and	O
light	O
on	O
the	O
side	O
of	O
the	O
chassis	O
,	O
and	O
the	O
optical	O
drive	O
,	O
being	O
the	O
first	O
professional	O
notebook	B-Device
since	O
the	O
PowerBook	B-Device
2400c	I-Device
,	O
but	O
brought	O
a	O
new	O
MagSafe	O
port	O
,	O
dubbed	O
the	O
"	O
MagSafe	O
2	O
"	O
.	O
</s>
<s>
Apple	O
also	O
claims	O
improved	O
speakers	O
and	O
microphones	O
and	O
a	O
new	O
system	O
for	O
cooling	O
the	O
notebook	B-Device
with	O
improved	O
fans	O
.	O
</s>
<s>
The	O
Retina	B-Operating_System
models	O
also	O
have	O
fewer	O
user-accessible	O
upgrade	O
or	O
replacement	O
options	O
than	O
previous	O
MacBooks	B-Device
.	O
</s>
<s>
Unlike	O
the	O
unibody	O
MacBook	B-Device
Pros	I-Device
,	O
the	O
memory	O
is	O
soldered	O
onto	O
the	O
logic	O
board	O
and	O
is	O
therefore	O
not	O
upgradable	O
.	O
</s>
<s>
The	O
solid	B-Device
state	I-Device
drive	I-Device
is	O
not	O
soldered	O
and	O
can	O
be	O
replaced	O
by	O
users	O
,	O
although	O
it	O
has	O
a	O
proprietary	O
connector	O
and	O
form	O
factor	O
.	O
</s>
<s>
The	O
battery	O
is	O
glued	O
into	O
place	O
;	O
attempts	O
to	O
remove	O
it	O
may	O
destroy	O
the	O
battery	O
and/or	O
trackpad	B-Application
.	O
</s>
<s>
The	O
entire	O
case	O
uses	O
proprietary	O
pentalobe	B-Operating_System
screws	I-Operating_System
and	O
cannot	O
be	O
disassembled	O
with	O
standard	O
tools	O
.	O
</s>
<s>
The	O
initial	O
revision	O
includes	O
Intel	O
's	O
third-generation	O
Core	B-Device
i7	I-Device
processors	O
(	O
Ivy	B-Device
Bridge	I-Device
microarchitecture	I-Device
)	O
.	O
</s>
<s>
Support	O
for	O
4K	B-Architecture
video	I-Architecture
output	O
via	O
HDMI	B-Protocol
was	O
added	O
but	O
limited	O
the	O
maximum	O
number	O
of	O
external	O
displays	O
from	O
three	O
to	O
two	O
.	O
</s>
<s>
On	O
March	O
9	O
,	O
2015	O
,	O
the	O
13-inch	O
model	O
was	O
updated	O
with	O
Intel	O
Broadwell	O
processors	O
,	O
Iris	O
6100	O
graphics	O
,	O
faster	O
flash	O
storage	O
(	O
based	O
on	O
PCIe	O
2.0	O
×	O
4	O
technology	O
)	O
,	O
faster	O
RAM	O
(	O
upgraded	O
from	O
1600MHZ	O
to	O
1866MHZ	O
)	O
,	O
increased	O
battery	O
life	O
(	O
extended	O
to	O
10	O
hours	O
)	O
,	O
and	O
a	O
Force	B-Device
Touch	I-Device
trackpad	B-Application
.	O
</s>
<s>
On	O
May	O
19	O
,	O
2015	O
,	O
15-inch	O
model	O
added	O
Force	B-Device
Touch	I-Device
and	O
changed	O
the	O
GPU	B-Architecture
to	O
AMD	O
Radeon	O
R9	O
M370X	O
,	O
SSD	B-Device
based	O
on	O
PCIe	O
3.0	O
×	O
4	O
technology	O
,	O
the	O
battery	O
life	O
was	O
extended	O
to	O
9	O
hours	O
,	O
and	O
the	O
rest	O
of	O
the	O
configuration	O
remained	O
unchanged	O
.	O
</s>
<s>
In	O
June	O
2019	O
,	O
Apple	O
announced	O
a	O
worldwide	O
recall	O
for	O
certain	O
2015	O
15	O
"	O
MacBook	B-Device
Pro	I-Device
computers	O
after	O
receiving	O
at	O
least	O
26	O
reports	O
of	O
batteries	O
becoming	O
hot	O
enough	O
to	O
produce	O
smoke	O
and	O
inflict	O
minor	O
burns	O
or	O
property	O
damage	O
.	O
</s>
<s>
In	O
September	O
2019	O
,	O
India	O
's	O
Directorate	O
General	O
of	O
Civil	O
Aviation	O
said	O
MacBook	B-Device
Pro	I-Device
computers	O
could	O
dangerously	O
overheat	O
,	O
leading	O
the	O
national	O
carrier	O
Air	O
India	O
to	O
ban	O
the	O
model	O
on	O
its	O
flights	O
.	O
</s>
<s>
Final	O
models	O
of	O
the	O
Retina	B-Operating_System
MacBook	B-Device
Pro	I-Device
were	O
unsupported	O
with	O
the	O
release	O
of	O
macOS	B-Operating_System
Ventura	I-Operating_System
in	O
2022	O
.	O
</s>
<s>
Apple	O
unveiled	O
Touch	O
Bar	O
13	O
-	O
and	O
15-inch	O
MacBook	B-Device
Pro	I-Device
models	O
during	O
a	O
press	O
event	O
at	O
their	O
headquarters	O
on	O
October	O
27	O
,	O
2016	O
.	O
</s>
<s>
All	O
models	O
,	O
except	O
for	O
the	O
baseline	O
13-inch	O
model	O
,	O
featured	O
the	O
Touch	O
Bar	O
,	O
a	O
new	O
multi-touch-enabled	O
OLED	B-Device
strip	O
built	O
into	O
the	O
top	O
of	O
the	O
keyboard	O
in	O
place	O
of	O
the	O
function	B-Application
keys	I-Application
.	O
</s>
<s>
The	O
models	O
also	O
introduced	O
a	O
"	O
second-generation	O
"	O
butterfly-mechanism	O
keyboard	O
whose	O
keys	O
have	O
more	O
travel	O
than	O
the	O
first	O
iteration	O
in	O
the	O
Retina	B-Operating_System
MacBook	B-Device
.	O
</s>
<s>
The	O
13-inch	O
model	O
has	O
a	O
trackpad	B-Application
that	O
is	O
46%	O
larger	O
than	O
its	O
predecessor	O
while	O
the	O
15-inch	O
model	O
has	O
a	O
trackpad	B-Application
twice	O
as	O
large	O
as	O
the	O
Retina	B-Operating_System
models	O
.	O
</s>
<s>
All	O
ports	O
have	O
been	O
replaced	O
with	O
either	O
two	O
or	O
four	O
combination	O
Thunderbolt	B-Protocol
3	I-Protocol
ports	O
that	O
support	O
USB-C	O
3.1	O
Gen	O
2	O
and	O
dual	O
DisplayPort	B-Protocol
1.2	O
signals	O
,	O
any	O
of	O
which	O
can	O
be	O
used	O
for	O
charging	O
.	O
</s>
<s>
The	O
MacBook	B-Device
Pro	I-Device
is	O
incompatible	O
with	O
some	O
older	O
Thunderbolt	O
3-certified	O
peripherals	O
,	O
including	O
Intel	O
's	O
own	O
reference	O
design	O
for	O
Thunderbolt	B-Protocol
3	I-Protocol
devices	O
.	O
</s>
<s>
Furthermore	O
,	O
macOS	B-Application
on	O
MacBook	B-Device
Pro	I-Device
blacklists	O
(	O
prevents	O
from	O
working	O
)	O
certain	O
classes	O
of	O
Thunderbolt	O
3-compatible	O
devices	O
.	O
</s>
<s>
Support	O
for	O
Thunderbolt	B-Protocol
3	I-Protocol
external	O
graphics	B-Architecture
processing	I-Architecture
units	I-Architecture
(	O
eGPU	O
)	O
was	O
added	O
in	O
macOS	B-Operating_System
High	I-Operating_System
Sierra	I-Operating_System
10.13.4	O
.	O
</s>
<s>
Devices	O
using	O
HDMI	B-Protocol
,	O
previous-generation	O
Thunderbolt	B-Protocol
,	O
and	O
USB	B-Protocol
need	O
an	O
adapter	O
to	O
connect	O
to	O
the	O
MacBook	B-Device
Pro	I-Device
.	O
</s>
<s>
The	O
models	O
come	O
with	O
a	O
3.5	B-Device
mm	I-Device
headphone	I-Device
jack	I-Device
;	O
the	O
TOSLINK	B-Protocol
functionality	O
of	O
previous	O
MacBook	B-Device
Pro	I-Device
models	O
has	O
been	O
removed	O
.	O
</s>
<s>
Other	O
updates	O
to	O
the	O
MacBook	B-Device
Pro	I-Device
include	O
dual	O
-	O
and	O
quad-core	O
Intel	B-Architecture
Skylake	I-Architecture
Core	B-Device
i5	I-Device
and	O
i7	B-Device
processors	O
,	O
improved	O
graphics	O
,	O
and	O
displays	O
that	O
offer	O
a	O
25%	O
wider	O
color	O
gamut	O
,	O
67%	O
more	O
brightness	O
,	O
and	O
67%	O
more	O
contrast	O
.	O
</s>
<s>
All	O
versions	O
can	O
output	O
to	O
a	O
5K	B-Device
display	O
;	O
the	O
15-inch	O
models	O
can	O
drive	O
two	O
such	O
displays	O
.	O
</s>
<s>
The	O
base	O
13-inch	O
model	O
has	O
function	B-Application
keys	I-Application
instead	O
of	O
the	O
Touch	O
Bar	O
,	O
and	O
just	O
two	O
USB-C	O
ports	O
.	O
</s>
<s>
The	O
flash	O
storage	O
in	O
the	O
Touch	O
Bar	O
models	O
is	O
soldered	O
to	O
the	O
logic	O
board	O
and	O
is	O
not	O
upgradeable	O
,	O
while	O
in	O
the	O
13-inch	O
model	O
without	O
Touch	O
Bar	O
,	O
it	O
is	O
removable	O
,	O
but	O
difficult	O
to	O
replace	O
,	O
as	O
it	O
is	O
a	O
proprietary	O
format	O
of	O
SSD	B-Device
storage	O
.	O
</s>
<s>
On	O
June	O
5	O
,	O
2017	O
,	O
Apple	O
updated	O
the	O
line	O
with	O
Intel	B-Device
Kaby	I-Device
Lake	I-Device
processors	O
and	O
newer	O
graphics	O
cards	O
.	O
</s>
<s>
On	O
July	O
12	O
,	O
2018	O
,	O
Apple	O
updated	O
the	O
Touch	O
Bar	O
models	O
with	O
Intel	O
Coffee	B-Device
Lake	I-Device
quad-core	O
processors	O
in	O
13-inch	O
models	O
and	O
six-core	O
processors	O
in	O
15-inch	O
models	O
,	O
updated	O
graphics	O
cards	O
,	O
third-generation	O
butterfly	O
keyboards	O
that	O
introduced	O
new	O
symbols	O
for	O
the	O
control	O
and	O
option	O
keys	O
,	O
Bluetooth	O
5	O
,	O
T2	B-Device
SoC	I-Device
Chip	I-Device
,	O
True	O
Tone	O
display	O
technology	O
,	O
and	O
larger-capacity	O
batteries	O
.	O
</s>
<s>
On	O
July	O
9	O
,	O
2019	O
,	O
Apple	O
updated	O
the	O
13-inch	O
model	O
with	O
two	O
Thunderbolt	B-Protocol
ports	I-Protocol
with	O
newer	O
quad-core	O
eighth-generation	O
processors	O
and	O
Intel	O
Iris	O
Plus	O
graphics	O
,	O
True	O
Tone	O
display	O
technology	O
,	O
and	O
replaced	O
the	O
function	B-Application
keys	I-Application
with	O
the	O
Touch	O
Bar	O
.	O
</s>
<s>
macOS	B-Device
Catalina	I-Device
added	O
support	O
for	O
Dolby	O
Atmos	O
,	O
Dolby	B-Device
Vision	I-Device
,	O
and	O
HDR10	B-Device
on	O
2018	O
and	O
newer	O
models	O
.	O
</s>
<s>
macOS	B-Device
Catalina	I-Device
10.15.2	O
added	O
support	O
for	O
6016x3384	O
output	O
on	O
15-inch	O
2018	O
and	O
newer	O
models	O
to	O
run	O
the	O
Pro	B-Device
Display	I-Device
XDR	I-Device
at	O
full	O
resolution	O
.	O
</s>
<s>
The	O
2019	O
MacBook	B-Device
Pro	I-Device
was	O
the	O
final	O
model	O
that	O
could	O
run	O
macOS	B-Device
Mojave	I-Device
10.14	O
,	O
the	O
final	O
macOS	B-Application
version	O
that	O
can	O
run	O
32-bit	O
applications	O
such	O
as	O
Microsoft	B-Operating_System
Office	I-Operating_System
for	I-Operating_System
Mac	I-Operating_System
2011	I-Operating_System
.	O
</s>
<s>
In	O
June	O
2018	O
,	O
Apple	O
announced	O
a	O
Service	O
Program	O
to	O
"	O
service	O
eligible	O
MacBook	B-Device
and	O
MacBook	B-Device
Pro	I-Device
keyboards	O
,	O
free	O
of	O
charge	O
"	O
.	O
</s>
<s>
As	O
of	O
early	O
2019	O
,	O
there	O
were	O
reports	O
of	O
problems	O
with	O
the	O
same	O
type	O
of	O
keyboards	O
in	O
the	O
2018	O
MacBook	B-Device
Air	I-Device
.	O
</s>
<s>
In	O
May	O
2019	O
,	O
Apple	O
modified	O
the	O
keyboard	O
for	O
the	O
fourth	O
time	O
and	O
promised	O
that	O
any	O
MacBook	B-Device
keyboard	O
with	O
butterfly	O
switches	O
would	O
be	O
repaired	O
or	O
replaced	O
free	O
of	O
charge	O
for	O
a	O
period	O
of	O
four	O
years	O
after	O
the	O
date	O
of	O
sale	O
.	O
</s>
<s>
The	O
Touch	O
Bar	O
MacBook	B-Device
Pro	I-Device
received	O
mixed	O
reviews	O
.	O
</s>
<s>
The	O
display	O
,	O
build	O
quality	O
,	O
and	O
audio	O
quality	O
were	O
praised	O
but	O
many	O
complained	O
about	O
the	O
butterfly	O
keyboard	O
;	O
the	O
little-used	O
Touch	O
Bar	O
;	O
and	O
the	O
absence	O
of	O
USB-A	O
ports	O
,	O
HDMI	B-Protocol
port	O
,	O
and	O
SD	B-Device
card	I-Device
slot	O
.	O
</s>
<s>
The	O
four	O
Thunderbolt	B-Protocol
port	I-Protocol
version	O
comes	O
with	O
Ice	B-Device
Lake	I-Device
processors	O
,	O
updated	O
graphics	O
,	O
up	O
to	O
32GB	O
of	O
memory	O
and	O
4TB	O
of	O
storage	O
,	O
and	O
supports	O
6K	O
output	O
to	O
run	O
the	O
Pro	B-Device
Display	I-Device
XDR	I-Device
.	O
</s>
<s>
The	O
two	O
Thunderbolt	B-Protocol
port	I-Protocol
version	O
has	O
the	O
same	O
Coffee	B-Device
Lake	I-Device
processors	O
,	O
graphics	O
,	O
and	O
maximum	O
storage	O
and	O
memory	O
as	O
the	O
2019	O
two	O
Thunderbolt	B-Protocol
port	I-Protocol
models	O
.	O
</s>
<s>
On	O
November	O
10	O
,	O
2020	O
,	O
Apple	O
introduced	O
a	O
new	O
13-inch	O
MacBook	B-Device
Pro	I-Device
with	O
two	O
Thunderbolt	B-Protocol
ports	I-Protocol
with	O
a	O
brand	O
new	O
Apple	B-Device
M1	I-Device
processor	O
,	O
directly	O
replacing	O
the	O
previous	O
generation	O
of	O
Intel-based	O
2020	O
baseline	O
13-inch	O
MacBook	B-Device
Pro	I-Device
with	O
two	O
Thunderbolt	B-Protocol
ports	I-Protocol
.	O
</s>
<s>
The	O
M1	B-Device
13-inch	O
MacBook	B-Device
Pro	I-Device
was	O
released	O
alongside	O
an	O
updated	O
MacBook	B-Device
Air	I-Device
and	O
Mac	B-Device
Mini	I-Device
as	O
the	O
first	O
generation	O
of	O
Macs	B-Device
with	O
Apple	O
's	O
new	O
line	O
of	O
custom	O
ARM-based	B-Architecture
Apple	B-Device
silicon	I-Device
processors	O
.	O
</s>
<s>
This	O
MacBook	B-Device
Pro	I-Device
model	O
retains	O
the	O
same	O
form	O
factor/design	O
and	O
added	O
support	O
for	O
Wi-Fi	O
6	O
,	O
USB4	O
,	O
and	O
6K	O
output	O
to	O
run	O
the	O
Pro	B-Device
Display	I-Device
XDR	I-Device
,	O
and	O
increased	O
the	O
memory	O
in	O
the	O
base	O
configuration	O
to	O
8GB	O
.	O
</s>
<s>
The	O
supported	O
external	O
displays	O
was	O
reduced	O
to	O
one	O
,	O
as	O
the	O
previous	O
Intel-based	O
models	O
supported	O
two	O
4K	B-Architecture
displays	I-Architecture
.	O
</s>
<s>
The	O
FaceTime	B-Protocol
camera	O
remains	O
720p	O
but	O
Apple	O
advertises	O
an	O
improved	O
image	B-General_Concept
signal	I-General_Concept
processor	I-General_Concept
for	O
higher	O
quality	O
video	O
.	O
</s>
<s>
On	O
October	O
18	O
,	O
2021	O
,	O
Apple	O
replaced	O
the	O
high-end	O
13-inch	O
and	O
16-inch	O
Intel-based	O
MacBook	B-Device
Pros	I-Device
with	O
14-inch	O
and	O
16-inch	O
MacBook	B-Device
Pros	I-Device
,	O
now	O
equipped	O
with	O
the	O
new	O
Apple	B-Device
silicon	I-Device
chips	O
,	O
M1	B-Device
Pro	I-Device
and	I-Device
M1	I-Device
Max	I-Device
,	O
Apple	O
's	O
second	O
ARM-based	B-Architecture
chips	O
and	O
their	O
first	O
professional-focused	O
chips	O
.	O
</s>
<s>
Apple	O
addressed	O
many	O
criticisms	O
of	O
the	O
Touch	O
Bar	O
MacBook	B-Device
Pro	I-Device
by	O
restoring	O
hard	O
function	B-Application
keys	I-Application
in	O
place	O
of	O
the	O
Touch	O
Bar	O
,	O
an	O
HDMI	B-Protocol
port	O
,	O
an	O
SD	B-Device
card	I-Device
reader	O
,	O
MagSafe	O
charging	O
,	O
and	O
a	O
higher	O
base	O
memory	O
.	O
</s>
<s>
Other	O
additions	O
include	O
a	O
Liquid	B-Operating_System
Retina	I-Operating_System
XDR	O
display	O
with	O
thinner	O
bezels	O
and	O
an	O
iPhone-like	O
notch	O
,	O
ProMotion	O
variable	O
refresh	O
rate	O
,	O
a	O
1080p	O
webcam	B-Protocol
,	O
Wi-Fi	O
6	O
,	O
3	O
Thunderbolt	B-Protocol
ports	I-Protocol
,	O
a	O
6-speaker	O
sound	O
system	O
supporting	O
Dolby	O
Atmos	O
,	O
and	O
support	O
of	O
multiple	O
external	O
displays	O
.	O
</s>
<s>
The	O
keyboard	O
features	O
full-sized	O
function	B-Application
keys	I-Application
,	O
with	O
the	O
keyboard	O
set	O
in	O
a	O
"	O
double	O
anodized	O
"	O
black	O
well	O
.	O
</s>
<s>
The	O
MacBook	B-Device
Pro	I-Device
branding	O
has	O
been	O
removed	O
from	O
the	O
bottom	O
of	O
the	O
display	O
bezel	O
and	O
is	O
engraved	O
on	O
the	O
underside	O
of	O
the	O
chassis	O
instead	O
.	O
</s>
<s>
The	O
models	O
 '	O
appearance	O
has	O
been	O
compared	O
to	O
the	O
Titanium	O
PowerBook	B-Operating_System
G4	I-Operating_System
produced	O
from	O
2001	O
to	O
2003	O
.	O
</s>
<s>
The	O
new	O
models	O
come	O
with	O
the	O
Apple	B-Device
M2	I-Device
Pro	I-Device
and	I-Device
M2	I-Device
Max	I-Device
,	O
can	O
be	O
configured	O
with	O
up	O
to	O
96	O
GB	O
of	O
RAM	O
(	O
up	O
from	O
64	O
GB	O
)	O
,	O
support	O
HDMI	B-Protocol
2.1	O
that	O
can	O
drive	O
an	O
8K	O
external	O
display	O
(	O
the	O
2021	O
models	O
supported	O
HDMI	B-Protocol
2.0	O
)	O
,	O
and	O
support	O
faster	O
Wi-Fi	O
6E	O
.	O
</s>
<s>
Apple	O
advertises	O
the	O
new	O
16-inch	O
model	O
with	O
"	O
up	O
to	O
22	O
hours	O
"	O
of	O
battery	O
life	O
,	O
which	O
it	O
says	O
is	O
the	O
"	O
longest	O
battery	O
life	O
ever	O
"	O
in	O
a	O
Mac	B-Device
.	O
</s>
