<s>
Aqua	B-Application
is	O
the	O
graphical	B-Application
user	I-Application
interface	I-Application
,	O
design	O
language	O
and	O
visual	B-Application
theme	I-Application
of	O
Apple	O
's	O
macOS	B-Application
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Its	O
goal	O
is	O
to	O
"	O
incorporate	O
color	O
,	O
depth	O
,	O
translucence	O
,	O
and	O
complex	O
textures	O
into	O
a	O
visually	O
appealing	O
interface	O
"	O
in	O
macOS	B-Application
applications	O
.	O
</s>
<s>
Aqua	B-Application
was	O
first	O
introduced	O
at	O
the	O
2000	O
Macworld	O
Conference	O
&	O
Expo	O
in	O
San	O
Francisco	O
.	O
</s>
<s>
Its	O
first	O
appearance	O
in	O
a	O
commercial	O
product	O
was	O
in	O
the	O
July	O
2000	O
release	O
of	O
iMovie	B-Operating_System
2	O
,	O
followed	O
by	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
10.0	I-Operating_System
the	O
following	O
year	O
.	O
</s>
<s>
Aqua	B-Application
is	O
the	O
successor	O
to	O
Platinum	B-Operating_System
,	O
which	O
was	O
used	O
in	O
Mac	B-Operating_System
OS	I-Operating_System
8	I-Operating_System
,	O
Mac	B-Operating_System
OS	I-Operating_System
9	I-Operating_System
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Server	I-Operating_System
1.2	O
.	O
</s>
<s>
The	O
appearance	O
of	O
Aqua	B-Application
has	O
changed	O
frequently	O
over	O
the	O
years	O
,	O
most	O
recently	O
and	O
drastically	O
with	O
the	O
release	O
of	O
macOS	B-Operating_System
Big	I-Operating_System
Sur	I-Operating_System
in	O
2020	O
which	O
Apple	O
calls	O
the	O
"	O
biggest	O
design	O
upgrade	O
since	O
the	O
introduction	O
of	O
Mac	O
OS	O
X.	O
"	O
</s>
<s>
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
10.2	I-Operating_System
"	I-Operating_System
Jaguar	I-Operating_System
"	I-Operating_System
brought	O
flatter	O
interface	O
elements	O
,	O
such	O
as	O
new	O
buttons	O
and	O
drop-down	O
menus	O
,	O
and	O
reduced	O
the	O
transparency	O
to	O
tone	O
down	O
the	O
pinstripes	O
in	O
windows	O
and	O
menus	O
.	O
</s>
<s>
These	O
trends	O
continued	O
in	O
subsequent	O
Mac	B-Device
OS	I-Device
X	I-Device
releases	O
.	O
</s>
<s>
In	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Panther	I-Operating_System
buttons	O
were	O
made	O
to	O
appear	O
sunken	O
into	O
their	O
surroundings	O
,	O
following	O
a	O
general	O
trend	O
of	O
more	O
flattened	O
interface	O
elements	O
in	O
the	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
New	O
icons	B-Device
appeared	O
across	O
the	O
system	O
,	O
including	O
a	O
new	O
flatter	O
,	O
glossier	O
Finder	B-Application
icon	B-Device
and	O
a	O
new	O
System	B-Operating_System
Preferences	I-Operating_System
icon	B-Device
.	O
</s>
<s>
Panther	B-Operating_System
also	O
featured	O
an	O
increased	O
use	O
of	O
the	O
"	O
Brushed	O
Metal	O
"	O
look	O
,	O
especially	O
to	O
the	O
Finder	B-Application
and	O
Safari	B-Application
web	I-Application
browser	I-Application
.	O
</s>
<s>
Brushed	O
Metal	O
had	O
first	O
appeared	O
in	O
QuickTime	B-Application
Player	I-Application
4.0	O
in	O
1999	O
.	O
</s>
<s>
Apple	O
's	O
Human	B-Application
Interface	I-Application
Guidelines	I-Application
stated	O
that	O
the	O
brushed	O
metal	O
interface	O
be	O
used	O
for	O
programs	O
that	O
mimic	O
the	O
operation	O
or	O
interface	O
of	O
common	O
real	O
world	O
devices	O
(	O
skeuomorphism	O
)	O
.	O
</s>
<s>
Mac	B-Application
OS	I-Application
X	I-Application
Tiger	I-Application
brought	O
more	O
subtle	O
changes	O
,	O
including	O
the	O
unified	O
titlebar	O
scheme	O
.	O
</s>
<s>
The	O
Apple	O
menu	O
icon	B-Device
was	O
toned	O
down	O
to	O
a	O
more	O
matte	O
appearance	O
and	O
the	O
new	O
Spotlight	B-Application
search	O
utility	O
was	O
permanently	O
bound	O
to	O
the	O
very	O
right	O
of	O
the	O
menu	O
bar	O
in	O
the	O
same	O
color	O
and	O
gradient	O
of	O
the	O
Apple	O
menu	O
.	O
</s>
<s>
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
brought	O
wide-ranging	O
changes	O
to	O
Aqua	B-Application
.	O
</s>
<s>
Aqua	B-Application
windows	O
and	O
"	O
brushed	O
metal	O
"	O
windows	O
obtained	O
the	O
same	O
metal-like	O
,	O
gray	O
look	O
,	O
pin-striped	O
backgrounds	O
were	O
removed	O
entirely	O
,	O
toolbars	O
and	O
titlebars	O
were	O
fused	O
into	O
a	O
whole	O
,	O
differences	O
between	O
active	O
and	O
inactive	O
windows	O
became	O
more	O
distinct	O
through	O
thicker	O
drop	O
shadows	O
and	O
a	O
monochrome	O
appearance	O
of	O
inactive	O
windows	O
,	O
the	O
color	O
of	O
the	O
menubar	O
was	O
changed	O
into	O
gray	O
with	O
an	O
optional	O
semi-transparency	O
look	O
on	O
capable	O
Macs	O
and	O
the	O
Dock	O
obtained	O
a	O
3D	O
look	O
with	O
a	O
reflective	O
glass-like	O
'	O
floor	O
 '	O
.	O
</s>
<s>
Context	O
menus	O
had	O
slightly-rounded	O
corners	O
and	O
numerous	O
icons	B-Device
were	O
redesigned	O
,	O
including	O
folder	O
icons	B-Device
and	O
System	B-Operating_System
Preferences	I-Operating_System
icons	B-Device
.	O
</s>
<s>
Mac	B-Device
OS	I-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
made	O
almost	O
no	O
changes	O
to	O
Aqua	B-Application
.	O
</s>
<s>
Mac	B-Application
OS	I-Application
X	I-Application
Lion	I-Application
introduced	O
many	O
changes	O
inspired	O
by	O
iOS	B-Application
that	O
persisted	O
in	O
OS	B-Operating_System
X	I-Operating_System
Mavericks	I-Operating_System
as	O
well	O
as	O
OS	B-Device
X	I-Device
Yosemite	I-Device
,	O
although	O
the	O
latter	O
changed	O
the	O
overall	O
aesthetic	O
.	O
</s>
<s>
The	O
corner	O
radii	O
of	O
push	O
buttons	O
were	O
reduced	O
,	O
giving	O
an	O
appearance	O
similar	O
to	O
Mac	B-Operating_System
OS	I-Operating_System
8	I-Operating_System
and	O
9	B-Operating_System
.	O
</s>
<s>
Lion	B-Application
also	O
added	O
more	O
animations	O
.	O
</s>
<s>
OS	B-Operating_System
X	I-Operating_System
Mountain	I-Operating_System
Lion	I-Operating_System
brought	O
only	O
minor	O
changes	O
and	O
changed	O
the	O
Dock	O
's	O
appearance	O
into	O
a	O
frosted-glass	O
style	O
,	O
with	O
rounded	O
corners	O
,	O
rectangular	O
indicator	O
lights	O
,	O
a	O
new	O
diagonal	O
separator	O
and	O
a	O
new	O
Trash	O
icon	B-Device
.	O
</s>
<s>
OS	B-Operating_System
X	I-Operating_System
Mavericks	I-Operating_System
dispensed	O
with	O
several	O
rich	O
and	O
ornamental	O
designs	O
,	O
reflecting	O
the	O
design	O
overhaul	O
in	O
.	O
</s>
<s>
The	O
applications	O
Calendar	B-Operating_System
,	O
Contacts	B-Operating_System
and	O
Notes	B-Operating_System
respectively	O
lost	O
their	O
leather	O
,	O
book	O
and	O
notepad	O
appearance	O
(	O
all	O
introduced	O
in	O
Lion	B-Application
)	O
.	O
</s>
<s>
In	O
OS	B-Device
X	I-Device
Yosemite	I-Device
,	O
many	O
of	O
the	O
Aqua	B-Application
elements	O
and	O
icons	B-Device
were	O
simplified	B-Application
and	O
flattened	O
,	O
following	O
a	O
similar	O
design	O
change	O
in	O
.	O
</s>
<s>
Apple	O
incorporated	O
the	O
same	O
saturated	O
frosted-glass	O
effect	O
,	O
called	O
"	O
Vibrancy	B-Application
"	O
,	O
across	O
the	O
system	O
.	O
</s>
<s>
Toolbar	O
buttons	O
became	O
white	O
and	O
Apple	O
introduced	O
a	O
more	O
compact	O
type	O
of	O
toolbar	O
that	O
removed	O
the	O
window	O
title	O
,	O
but	O
retained	O
the	O
toolbar	O
buttons	O
(	O
for	O
example	O
,	O
in	O
Safari	B-Application
)	O
.	O
</s>
<s>
Certain	O
controls	O
,	O
such	O
as	O
checkboxes	O
and	O
radio	O
buttons	O
,	O
gained	O
animations	O
,	O
whereas	O
animations	O
in	O
other	O
places	O
were	O
removed	O
,	O
such	O
as	O
the	O
"	O
poof	O
"	O
animation	O
when	O
removing	O
an	O
icon	B-Device
from	O
the	O
Dock	O
and	O
the	O
"	O
cube	O
"	O
animation	O
when	O
fast-switching	O
to	O
another	O
user	O
account	O
.	O
</s>
<s>
OS	B-Operating_System
X	I-Operating_System
El	I-Operating_System
Capitan	I-Operating_System
made	O
only	O
minor	O
changes	O
to	O
Aqua	B-Application
.	O
</s>
<s>
The	O
white	O
toolbar	O
buttons	O
regained	O
a	O
slightly	O
glossy	O
look	O
,	O
the	O
spinning	B-Operating_System
pinwheel	I-Operating_System
was	O
redesigned	O
and	O
the	O
Vibrancy	B-Application
effect	O
was	O
reduced	O
in	O
certain	O
areas	O
,	O
such	O
as	O
Mission	O
Control	O
.	O
</s>
<s>
The	O
system	O
typeface	O
was	O
changed	O
once	O
more	O
,	O
to	O
Apple	O
's	O
own	O
San	O
Francisco	O
typeface	O
,	O
concurrent	O
with	O
and	O
following	O
the	O
typeface	O
's	O
release	O
in	O
watchOS	B-Device
in	O
April	O
2015	O
.	O
</s>
<s>
These	O
changes	O
continued	O
throughout	O
macOS	B-Operating_System
Sierra	I-Operating_System
,	O
High	B-Operating_System
Sierra	I-Operating_System
,	O
Mojave	B-Device
,	O
and	O
Catalina	B-Device
.	O
</s>
<s>
macOS	B-Operating_System
Big	I-Operating_System
Sur	I-Operating_System
brought	O
major	O
changes	O
to	O
Aqua	B-Application
design	O
that	O
brings	O
it	O
in	O
line	O
with	O
other	O
Apple	O
platforms	O
such	O
as	O
iOS	B-Application
and	O
iPadOS	B-Operating_System
.	O
</s>
<s>
The	O
Dock	O
is	O
now	O
detached	O
from	O
the	O
screen	B-Device
edge	O
and	O
more	O
rounded	O
on	O
all	O
corners	O
.	O
</s>
<s>
The	O
icons	B-Device
are	O
now	O
all	O
squircle-shaped	O
and	O
take	O
on	O
more	O
noticeable	O
depth	O
in	O
general	O
.	O
</s>
<s>
Modal	O
dialogs	O
have	O
changed	O
significantly	O
,	O
only	O
being	O
as	O
large	O
as	O
the	O
content	O
inside	O
;	O
laid	O
out	O
with	O
a	O
large	O
icon	B-Device
at	O
the	O
top	O
,	O
text	O
in	O
the	O
center	O
,	O
and	O
buttons	O
at	O
the	O
bottom	O
.	O
</s>
<s>
Windows	O
now	O
have	O
more	O
rounded	O
corners	O
take	O
on	O
a	O
tint	O
from	O
the	O
user	O
's	O
wallpaper	O
,	O
akin	O
to	O
Windows	B-Application
11	I-Application
's	O
Mica	O
effect	O
.	O
</s>
<s>
This	O
revision	O
of	O
Aqua	B-Application
continued	O
to	O
be	O
used	O
in	O
macOS	B-Device
Monterey	I-Device
and	O
Ventura	B-Operating_System
.	O
</s>
<s>
Aqua	B-Application
has	O
also	O
been	O
embedded	O
in	O
Apple	O
's	O
applications	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
such	O
as	O
iTunes	B-Operating_System
,	O
QuickTime	B-Application
and	O
Safari	B-Application
(	O
although	O
not	O
in	O
Safari	B-Application
4	O
)	O
.	O
</s>
<s>
iTunes	B-Operating_System
for	O
Windows	O
has	O
generally	O
adopted	O
the	O
same	O
developments	O
as	O
the	O
concurrent	O
macOS	B-Application
version	O
,	O
with	O
the	O
exception	O
of	O
the	O
use	O
of	O
native	O
Windows	O
user	O
interface	O
controls	O
and	O
Windows-style	O
title	O
bar	O
buttons	O
at	O
the	O
upper	O
right	O
of	O
the	O
player	O
window	O
.	O
</s>
<s>
The	O
Windows	O
version	O
of	O
Safari	B-Application
,	O
in	O
version	O
3	O
,	O
included	O
a	O
functional	O
Aqua	B-Application
look	B-Application
and	I-Application
feel	I-Application
that	O
was	O
very	O
similar	O
to	O
macOS	B-Application
.	O
</s>
<s>
QuickTime	B-Application
for	O
Windows	O
uses	O
the	O
same	O
theme	O
as	O
seen	O
in	O
older	O
versions	O
of	O
QuickTime	B-Application
for	O
,	O
with	O
brushed-metal	O
windows	O
and	O
Aqua	B-Application
buttons	O
on	O
top	O
.	O
</s>
<s>
Gray	O
,	O
white	O
and	O
blue	O
are	O
the	O
three	O
principal	O
colors	O
which	O
define	O
the	O
Aqua	B-Application
style	O
.	O
</s>
<s>
In	O
versions	O
of	O
prior	O
to	O
OS	B-Device
X	I-Device
Yosemite	I-Device
,	O
most	O
controls	O
have	O
a	O
"	O
glass	O
"	O
or	O
"	O
gel	O
"	O
effect	O
applied	O
to	O
them	O
.	O
</s>
<s>
macOS	B-Application
has	O
few	O
native	O
customization	O
options	O
to	O
change	O
the	O
overall	O
look	O
of	O
the	O
system	O
.	O
</s>
<s>
Historically	O
,	O
Aqua	B-Application
had	O
two	O
window	O
designs	O
:	O
the	O
default	O
Aqua	B-Application
windows	O
and	O
"	O
brushed	O
metal	O
"	O
windows	O
.	O
</s>
<s>
Aqua	B-Application
windows	O
typically	O
have	O
a	O
metal-like	O
or	O
gray	O
titlebar	O
with	O
three	O
buttons	O
on	O
the	O
left	O
side	O
(	O
for	O
closing	O
,	O
minimizing	O
and	O
zooming	O
or	O
entering	O
fullscreen	O
mode	O
)	O
.	O
</s>
<s>
Aqua	B-Application
windows	O
have	O
almost	O
no	O
frame	O
or	O
outside	O
border	O
,	O
instead	O
drop	O
shadows	O
are	O
used	O
to	O
separate	O
and	O
distinguish	O
active	O
from	O
inactive	O
windows	O
.	O
</s>
<s>
Apple	O
recommended	O
brushed-metal	O
windows	O
for	O
applications	O
that	O
mimic	O
real-world	O
devices	O
(	O
such	O
as	O
iTunes	B-Operating_System
)	O
or	O
are	O
used	O
to	O
interface	O
with	O
such	O
devices	O
(	O
such	O
as	O
iSync	O
)	O
,	O
but	O
was	O
criticised	O
by	O
designers	O
for	O
not	O
following	O
its	O
own	O
guidelines	O
or	O
applying	O
it	O
inconsistently	O
(	O
it	O
was	O
also	O
used	O
in	O
Safari	B-Application
or	O
Finder	B-Application
)	O
.	O
</s>
<s>
Brushed-metal	O
windows	O
have	O
been	O
largely	O
phased	O
out	O
since	O
Leopard	B-Application
and	O
become	O
visually	O
indistinctive	O
from	O
Aqua	B-Application
windows	O
.	O
</s>
<s>
Up	O
to	O
Leopard	B-Application
,	O
toolbars	O
were	O
visually	O
separated	O
from	O
the	O
titlebar	O
and	O
had	O
the	O
same	O
background	O
as	O
the	O
window	O
frame	O
or	O
were	O
pin-striped	O
.	O
</s>
<s>
Leopard	B-Application
introduced	O
a	O
unified	O
style	O
that	O
extended	O
the	O
metal-like	O
background	O
of	O
the	O
titlebar	O
to	O
the	O
toolbar	O
,	O
making	O
it	O
appear	O
as	O
one	O
whole	O
.	O
</s>
<s>
OS	B-Device
X	I-Device
Yosemite	I-Device
brought	O
a	O
compacter	O
version	O
of	O
the	O
toolbar	O
that	O
fused	O
the	O
titlebar	O
and	O
toolbar	O
together	O
,	O
made	O
it	O
shorter	O
and	O
removed	O
the	O
window	O
title	O
(	O
for	O
example	O
,	O
in	O
Safari	B-Application
8	O
and	O
later	O
)	O
.	O
</s>
<s>
The	O
parent	O
window	O
's	O
controls	O
are	O
disabled	O
until	O
the	O
sheet	O
is	O
dismissed	O
,	O
but	O
the	O
user	O
is	O
able	O
to	O
continue	O
work	O
in	O
other	O
windows	O
(	O
including	O
those	O
in	O
the	O
same	O
application	B-Application
)	O
while	O
the	O
sheet	O
is	O
open	O
.	O
</s>
<s>
In	O
application	B-Application
menus	O
,	O
which	O
run	O
in	O
a	O
single	O
bar	O
across	O
the	O
top	O
of	O
the	O
screen	B-Device
,	O
keyboard	O
shortcuts	O
appear	O
to	O
the	O
right-hand	O
side	O
of	O
the	O
menu	O
whilst	O
the	O
actual	O
menu	O
item	O
is	O
on	O
the	O
left	O
.	O
</s>
<s>
'	O
Pull	O
down	O
 '	O
menus	O
are	O
available	O
in	O
four	O
different	O
Aqua	B-Application
varieties	O
,	O
most	O
of	O
which	O
have	O
fallen	O
into	O
disuse	O
in	O
later	O
macOS	B-Application
releases	O
.	O
</s>
<s>
Mac	B-Application
OS	I-Application
X	I-Application
10.4	I-Application
introduced	O
a	O
new	O
interface	O
element	O
that	O
allows	O
the	O
user	O
to	O
drag	O
non-editable	O
'	O
tokens	O
 '	O
to	O
a	O
text	O
box	O
,	O
between	O
which	O
text	O
can	O
be	O
typed	O
.	O
</s>
<s>
The	O
action	O
of	O
a	O
blue	O
button	O
can	O
usually	O
also	O
be	O
invoked	O
with	O
the	O
return	B-Device
key	I-Device
.	O
</s>
<s>
Also	O
available	O
are	O
rounded	O
bevel	O
buttons	O
,	O
designed	O
to	O
hold	O
an	O
icon	B-Device
;	O
standard	O
square	O
buttons	O
;	O
glass	O
square	O
buttons	O
and	O
round	O
buttons	O
.	O
</s>
<s>
In	O
addition	O
,	O
circular	O
,	O
purple	O
online	B-Protocol
help	I-Protocol
buttons	O
are	O
available	O
which	O
display	O
help	O
relative	O
to	O
the	O
current	O
task	O
when	O
clicked	O
.	O
</s>
<s>
In	O
macOS	B-Application
,	O
empty	O
check	O
boxes	O
are	O
small	O
,	O
white	O
rounded	O
rectangles	O
.	O
</s>
<s>
Tables	O
and	O
lists	O
can	O
be	O
broadly	O
categorised	O
in	O
three	O
ways	O
:	O
A	O
standard	O
multi-columnar	O
table	O
with	O
space	O
to	O
enter	O
values	O
or	O
place	O
other	O
interface	O
elements	O
such	O
as	O
buttons	O
;	O
An	O
outline	O
view	O
that	O
can	O
contain	O
disclosure	O
triangles	O
to	O
show	O
and	O
hide	O
sets	O
of	O
data	O
;	O
and	O
a	O
Miller	O
columns	O
view	O
akin	O
to	O
the	O
column	O
view	O
in	O
the	O
Finder	B-Application
.	O
</s>
<s>
Two	O
main	O
types	O
of	O
loading/saving	O
progress	O
indicator	O
are	O
available	O
:	O
a	O
progress	O
bar	O
or	O
a	O
monochromatic	O
spinning	O
wheel	O
(	O
not	O
the	O
spinning	B-Operating_System
pinwheel	I-Operating_System
)	O
.	O
</s>
<s>
The	O
spinning	O
wheel	O
indicator	O
,	O
also	O
found	O
in	O
the	O
Mac	B-Device
OS	I-Device
X	I-Device
startup	O
screen	B-Device
since	O
version	O
10.2	O
,	O
is	O
simply	O
a	O
series	O
of	O
12	O
increasingly	O
darker	O
grey	O
lines	O
arranged	O
circularly	O
,	O
like	O
the	O
side	O
view	O
of	O
a	O
spoked	O
wheel	O
rotating	O
clockwise	O
.	O
</s>
<s>
Many	O
other	O
interfaces	O
have	O
adopted	O
this	O
device	O
,	O
including	O
the	O
Firefox	B-Application
and	O
Camino	B-Language
web	O
browsers	O
and	O
many	O
Web	O
2.0-influenced	O
web	O
sites	O
.	O
</s>
<s>
macOS	B-Application
has	O
a	O
standard	O
control	O
for	O
picking	O
colors	O
which	O
appears	O
as	O
a	O
regular	O
square	O
button	O
with	O
a	O
color	O
sample	O
in	O
the	O
middle	O
.	O
</s>
<s>
When	O
clicked	O
,	O
it	O
shows	O
the	O
standard	O
macOS	B-Application
color	O
palette	O
.	O
</s>
<s>
Tabs	O
in	O
macOS	B-Application
are	O
nearly	O
identical	O
to	O
push	O
buttons	O
,	O
with	O
the	O
unselected	O
tab(s )	O
being	O
white	O
and	O
the	O
selected	O
tab	O
being	O
blue	O
.	O
</s>
<s>
Occasionally	O
,	O
Apple	O
also	O
used	O
Helvetica	O
and	O
Helvetica	O
Neue	O
,	O
such	O
as	O
in	O
applications	O
like	O
Mail	B-Operating_System
and	O
iPhoto	B-Operating_System
.	O
</s>
<s>
macOS	B-Application
makes	O
use	O
of	O
system-wide	O
typeface	O
anti-aliasing	B-Algorithm
to	O
make	O
edges	O
appear	O
smoother	O
and	O
preserve	O
the	O
distinct	O
shapes	O
of	O
typefaces	O
,	O
sometimes	O
at	O
the	O
cost	O
of	O
sharpness	O
and	O
clarity	O
.	O
</s>
<s>
Aqua	B-Application
makes	O
heavy	O
use	O
of	O
animation	O
.	O
</s>
<s>
Dock	O
icons	B-Device
bounce	O
up	O
and	O
down	O
as	O
their	O
corresponding	O
applications	O
are	O
launched	O
.	O
</s>
<s>
Dock	O
icons	B-Device
also	O
bounce	O
up	O
and	O
down	O
,	O
in	O
a	O
different	O
rhythm	O
,	O
when	O
a	O
background	O
application	B-Application
requires	O
the	O
user	O
's	O
attention	O
.	O
</s>
<s>
Dock	O
icons	B-Device
can	O
increase	O
in	O
size	O
when	O
approached	O
by	O
the	O
cursor	O
.	O
</s>
<s>
By	O
pressing	O
the	O
shift	B-Device
key	I-Device
,	O
both	O
effects	O
can	O
be	O
seen	O
in	O
slow	O
motion	O
.	O
</s>
<s>
These	O
keystrokes	O
can	O
also	O
be	O
applied	O
to	O
other	O
Aqua	B-Application
effects	O
such	O
as	O
Dashboard	B-Application
,	O
Mission	O
Control	O
and	O
Front	B-Operating_System
Row	I-Operating_System
.	O
</s>
<s>
There	O
is	O
another	O
undocumented	O
dock	O
effect	O
called	O
"	O
Suck	O
"	O
which	O
can	O
be	O
enabled	O
by	O
hand	O
editing	O
a	O
configuration	O
file	O
or	O
using	O
a	O
Terminal	O
command	O
;	O
this	O
appears	O
to	O
be	O
the	O
same	O
effect	O
that	O
accompanies	O
the	O
removal	O
of	O
widgets	O
from	O
the	O
Dashboard	B-Application
.	O
</s>
<s>
When	O
a	O
folder	O
on	O
the	O
desktop	B-Application
is	O
opened	O
or	O
closed	O
,	O
the	O
corresponding	O
Finder	B-Application
window	O
appears	O
to	O
come	O
from	O
,	O
or	O
disappear	O
into	O
,	O
the	O
folder	O
icon	B-Device
rather	O
than	O
just	O
appearing	O
from	O
nowhere	O
.	O
</s>
<s>
This	O
effect	O
was	O
present	O
in	O
the	O
Classic	B-Application
Mac	I-Application
OS	I-Application
Finder	B-Application
as	O
ZoomRects	O
,	O
but	O
had	O
disappeared	O
from	O
early	O
Mac	B-Device
OS	I-Device
X	I-Device
developer	O
releases	O
.	O
</s>
<s>
Dashboard	B-Application
widgets	I-Application
appear	O
to	O
fly	O
onto	O
the	O
screen	B-Device
.	O
</s>
<s>
Dashboard	B-Application
widgets	I-Application
appear	O
with	O
a	O
"	O
ripple	O
"	O
effect	O
,	O
as	O
if	O
being	O
dropped	O
onto	O
the	O
surface	O
of	O
a	O
pond	O
.	O
</s>
<s>
Starting	O
from	O
Mac	B-Application
OS	I-Application
X	I-Application
10.7	I-Application
Lion	I-Application
,	O
the	O
default	O
Dashboard	B-Application
configuration	O
differs	O
from	O
that	O
of	O
previous	O
versions	O
(	O
it	O
takes	O
its	O
own	O
space	O
in	O
Mission	O
Control	O
)	O
,	O
causing	O
the	O
rippling	O
effect	O
to	O
be	O
removed	O
.	O
</s>
<s>
However	O
,	O
the	O
user	O
can	O
re-invoke	O
the	O
original	O
Dashboard	B-Application
(	O
along	O
with	O
the	O
ripple	O
effect	O
)	O
in	O
System	B-Operating_System
Preferences	I-Operating_System
.	O
</s>
<s>
The	O
contents	O
of	O
a	O
stack	O
will	O
appear	O
to	O
spring	O
out	O
from	O
behind	O
the	O
icon	B-Device
when	O
clicked	O
.	O
</s>
<s>
In	O
the	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Public	I-Operating_System
Beta	I-Operating_System
,	O
docked	O
items	O
dragged	O
onto	O
the	O
desktop	B-Application
simply	O
disappeared	O
,	O
apparently	O
'	O
dropping	O
 '	O
onto	O
the	O
desktop	B-Application
.	O
</s>
<s>
This	O
behaviour	O
was	O
changed	O
with	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
10.0	I-Operating_System
;	O
from	O
this	O
release	O
onward	O
,	O
items	O
dragged	O
off	O
the	O
dock	O
would	O
'	O
disappear	O
 '	O
in	O
a	O
cartoon-like	O
puff	O
of	O
smoke	O
,	O
an	O
effect	O
which	O
Apple	O
later	O
used	O
in	O
various	O
places	O
,	O
such	O
as	O
Safari	B-Application
's	O
Bookmarks	O
Bar	O
and	O
iPhoto	B-Operating_System
's	O
tag	O
removal	O
)	O
.	O
</s>
<s>
A	O
similar	O
effect	O
was	O
used	O
in	O
Apple	O
's	O
Newton	B-Device
OS	I-Device
.	O
</s>
<s>
In	O
OS	B-Device
X	I-Device
10.10	I-Device
Yosemite	I-Device
,	O
this	O
effect	O
is	O
no	O
longer	O
present	O
;	O
the	O
item	O
simply	O
disappears	O
,	O
however	O
can	O
still	O
be	O
seen	O
on	O
the	O
boot	O
picker	O
of	O
Intel-based	O
Mac	O
computers	O
when	O
a	O
boot	O
device	O
(	O
such	O
as	O
a	O
external	O
hard-drive	O
)	O
is	O
disconnected	O
from	O
the	O
computer	O
.	O
</s>
<s>
Starting	O
from	O
Mac	B-Application
OS	I-Application
X	I-Application
10.7	I-Application
Lion	I-Application
,	O
windows	O
which	O
contain	O
a	O
document	O
or	O
website	O
open	O
with	O
an	O
animation	O
similar	O
to	O
Windows	O
Aero	O
.	O
</s>
<s>
A	O
similar	O
zoom	O
effect	O
can	O
be	O
seen	O
when	O
opening	O
files	O
from	O
the	O
desktop	B-Application
,	O
or	O
within	O
a	O
Finder	B-Application
window	O
.	O
</s>
<s>
This	O
also	O
applies	O
to	O
the	O
entire	O
desktop	B-Application
when	O
a	O
user	O
logs	O
in	O
.	O
</s>
<s>
Aqua	B-Application
is	O
powered	O
by	O
the	O
display	O
server	O
Quartz	O
Compositor	O
.	O
</s>
<s>
Much	O
of	O
Aqua	B-Application
's	O
original	O
design	O
resembled	O
the	O
translucent	O
two-tone	O
look	O
of	O
Apple	O
's	O
contemporary	O
hardware	O
.	O
</s>
<s>
In	O
2003	O
and	O
2004	O
,	O
Apple	O
moved	O
to	O
the	O
use	O
of	O
brushed	O
aluminium	O
in	O
their	O
industrial	O
design	O
(	O
such	O
as	O
with	O
the	O
aluminium	O
Apple	B-Device
Cinema	I-Device
Displays	I-Device
)	O
.	O
</s>
<s>
The	O
design	O
of	O
Aqua	B-Application
changed	O
accordingly	O
.	O
</s>
<s>
In	O
the	O
past	O
,	O
Apple	O
has	O
threatened	O
legal	O
action	O
against	O
those	O
who	O
make	O
themes	O
similar	O
to	O
their	O
look	B-Application
and	I-Application
feel	I-Application
.	O
</s>
<s>
The	O
Mac	O
skinning	O
community	O
took	O
exception	O
to	O
Apple	O
's	O
heavy-handed	O
actions	O
against	O
all	O
Aqua	B-Application
lookalikes	O
.	O
</s>
<s>
Stardock	O
's	O
Brad	O
Wardell	O
contrasted	O
the	O
company	O
's	O
litigious	O
approach	O
with	O
Microsoft	O
's	O
approach	O
to	O
incorporating	O
third-party	O
skins	O
into	O
Windows	B-Application
XP	I-Application
.	O
</s>
