<s>
PearPC	B-Operating_System
is	O
an	O
architecture-independent	O
PowerPC	B-Architecture
platform	I-Architecture
emulator	B-Application
capable	O
of	O
running	O
many	O
PowerPC	B-Architecture
operating	B-General_Concept
systems	I-General_Concept
,	O
including	O
pre-Intel	O
versions	O
of	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
Darwin	B-Operating_System
and	O
Linux	B-Application
.	O
</s>
<s>
It	O
is	O
released	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
.	O
</s>
<s>
It	O
can	O
be	O
executed	O
on	O
Microsoft	B-Application
Windows	I-Application
,	O
Linux	B-Application
,	O
FreeBSD	B-Operating_System
and	O
other	O
systems	O
based	O
on	O
POSIX-X11	O
.	O
</s>
<s>
The	O
emulator	B-Application
features	O
a	O
just-in-time	O
(	O
JIT	O
)	O
processor	O
emulation	B-Application
core	O
which	O
dynamically	O
translates	O
PPC	O
code	O
into	O
x86	O
code	O
,	O
caching	O
the	O
results	O
.	O
</s>
<s>
Despite	O
running	O
only	O
on	O
x86	O
host	O
architectures	O
,	O
the	O
JIT	O
emulation	B-Application
core	O
runs	O
at	O
least	O
10	O
times	O
as	O
fast	O
as	O
the	O
architecture-independent	O
generic	O
processor	O
emulation	B-Application
core	O
.	O
</s>
<s>
However	O
,	O
according	O
to	O
the	O
man	B-Protocol
pages	I-Protocol
supplied	O
with	O
Debian	O
's	O
packages	O
of	O
PearPC	B-Operating_System
,	O
even	O
the	O
JIT	O
core	O
runs	O
around	O
40	O
times	O
slower	O
than	O
the	O
host	O
machine	O
would	O
if	O
executing	O
native	O
code	O
.	O
</s>
<s>
Until	O
December	O
2005	O
PearPC	B-Operating_System
advanced	O
quickly	O
in	O
speed	O
,	O
stability	O
and	O
features	O
.	O
</s>
<s>
Individuals	O
have	O
also	O
been	O
working	O
on	O
builds	O
with	O
more	O
features	O
such	O
as	O
native	O
CD-ROM	O
support	O
and	O
even	O
progress	O
in	O
emulating	B-Application
sound	O
had	O
begun	O
.	O
</s>
<s>
Builds	O
including	O
AltiVec	B-General_Concept
emulation	B-Application
to	O
run	O
applications	O
that	O
require	O
a	O
PowerPC	B-General_Concept
G4	I-General_Concept
processor	O
were	O
also	O
produced	O
,	O
although	O
there	O
were	O
numerous	O
problems	O
(	O
mainly	O
interface	O
glitches	O
)	O
with	O
running	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Tiger	O
using	O
such	O
builds	O
which	O
were	O
not	O
resolved	O
.	O
</s>
<s>
Support	O
for	O
graphics	O
acceleration	O
was	O
also	O
worked	O
on	O
,	O
which	O
in	O
theory	O
should	O
provide	O
a	O
major	O
performance	O
boost	O
due	O
to	O
OS	B-Operating_System
X	I-Operating_System
's	O
hardware-accelerated	O
GUI	B-Application
known	O
as	O
Quartz	O
Extreme	O
which	O
is	O
currently	O
not	O
supported	O
in	O
PearPC	B-Operating_System
.	O
</s>
<s>
The	O
current	O
official	O
version	O
of	O
PearPC	B-Operating_System
is	O
0.5.0	O
(	O
released	O
on	O
July	O
12	O
,	O
2015	O
)	O
.	O
</s>
<s>
While	O
its	O
PowerPC	B-Architecture
emulation	B-Application
handles	O
most	O
applications	O
and	O
the	O
emulator	B-Application
already	O
has	O
an	O
impressive	O
feature	O
set	O
,	O
the	O
project	O
still	O
lacks	O
features	O
needed	O
for	O
a	O
complete	O
emulation	B-Application
of	O
the	O
PowerPC	B-Architecture
experience	O
:	O
</s>
<s>
On	O
June	O
6	O
,	O
2005	O
,	O
Apple	O
's	O
(	O
then	O
)	O
CEO	O
,	O
Steve	O
Jobs	O
,	O
announced	O
that	O
Apple	O
would	O
begin	O
switching	O
its	O
computer	O
's	O
architecture	O
from	O
IBM	O
's	O
PowerPC	B-Architecture
to	O
Intel	O
's	O
x86	O
platform	O
.	O
</s>
<s>
The	O
news	O
raised	O
a	O
lot	O
of	O
questions	O
about	O
the	O
future	O
of	O
the	O
PearPC	B-Operating_System
project	O
because	O
although	O
the	O
project	O
itself	O
is	O
a	O
PowerPC	B-Architecture
emulator	B-Application
,	O
it	O
is	O
used	O
primarily	O
to	O
run	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
on	O
x86	O
machines	O
.	O
</s>
<s>
As	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
can	O
now	O
be	O
run	O
natively	O
on	O
the	O
x86	O
platform	O
,	O
including	O
on	O
non-Apple	O
computers	O
(	O
albeit	O
in	O
contravention	O
of	O
the	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
license	O
agreement	O
)	O
,	O
interest	O
in	O
PearPC	B-Operating_System
has	O
waned	O
since	O
and	O
attention	O
now	O
largely	O
centers	O
on	O
running	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
natively	O
on	O
x86	O
hardware	O
or	O
in	O
virtualization	O
software	O
such	O
as	O
VMware	B-Operating_System
Workstation	I-Operating_System
.	O
</s>
<s>
PearPC	B-Operating_System
currently	O
lacks	O
its	O
own	O
GUIthe	O
'	O
Change	O
CD	O
 '	O
button	O
found	O
in	O
early	O
versions	O
have	O
been	O
eliminated	O
because	O
it	O
rarely	O
functioned	O
correctly	O
.	O
</s>
<s>
Two	O
of	O
these	O
are	O
PearGUI	O
,	O
which	O
looks	O
like	O
a	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
application	O
but	O
is	O
incompatible	O
with	O
current	O
versions	O
of	O
PearPC	B-Operating_System
,	O
and	O
PearPCCP	O
(	O
short	O
for	O
"	O
PearPC	B-Operating_System
Control	O
Panel	O
"	O
)	O
,	O
which	O
is	O
compatible	O
with	O
PearPC	B-Operating_System
0.3	O
and	O
newer	O
.	O
</s>
<s>
PearGUI	O
's	O
incompleteness	O
annoys	O
many	O
users	O
and	O
its	O
'	O
Create	O
Disk	O
Image	O
 '	O
feature	O
is	O
not	O
yet	O
complete	O
(	O
a	O
severe	O
shortcoming	O
)	O
,	O
but	O
many	O
users	O
have	O
praised	O
its	O
GUI	B-Application
.	O
</s>
<s>
The	O
PearPC.net	O
website	O
also	O
released	O
its	O
own	O
Java-based	O
PearPC-GUI	O
,	O
called	O
APE	O
,	O
which	O
is	O
part	O
of	O
the	O
PearPC.net	O
Package	O
.	O
</s>
<s>
CherryOS	B-Application
is	O
alleged	O
to	O
be	O
simply	O
a	O
front-end	O
for	O
PearPC	B-Operating_System
.	O
</s>
<s>
Within	O
five	O
months	O
of	O
PearPC	B-Operating_System
's	O
release	O
,	O
another	O
PowerPC	B-Architecture
emulator	B-Application
called	O
CherryOS	B-Application
appeared	O
,	O
claiming	O
to	O
offer	O
more	O
features	O
and	O
greater	O
speed	O
.	O
</s>
<s>
However	O
,	O
within	O
hours	O
of	O
its	O
announcement	O
,	O
questions	O
were	O
raised	O
about	O
the	O
claims	O
,	O
with	O
many	O
experts	O
and	O
open-source	O
advocates	O
suggesting	O
that	O
CherryOS	B-Application
was	O
nothing	O
more	O
than	O
a	O
repackaging	O
of	O
PearPC	B-Operating_System
.	O
</s>
<s>
The	O
CherryOS	B-Application
Emulator	B-Application
was	O
re-released	O
in	O
March	O
2005	O
as	O
a	O
commercial	O
product	O
.	O
</s>
<s>
According	O
to	O
Cassondra	O
Foesch	O
,	O
a	O
principal	O
author	O
of	O
PearPC	B-Operating_System
,	O
it	O
still	O
contained	O
all	O
or	O
part	O
of	O
the	O
code	O
written	O
for	O
the	O
PearPC	B-Operating_System
Project	O
.	O
</s>
<s>
CherryOS	B-Application
also	O
created	O
questions	O
regarding	O
the	O
legality	O
of	O
commercial	O
software	O
developed	O
and	O
marketed	O
specifically	O
to	O
run	O
Mac	O
OS	O
on	O
the	O
x86	O
architecture	O
,	O
since	O
Apple	O
's	O
license	O
agreement	O
specifically	O
states	O
that	O
the	O
operating	B-General_Concept
system	I-General_Concept
may	O
only	O
be	O
installed	O
on	O
Apple-labeled	O
computers	O
.	O
</s>
<s>
Eventually	O
,	O
the	O
distribution	O
of	O
CherryOS	B-Application
ceased	O
due	O
to	O
the	O
very	O
high	O
amount	O
of	O
criticism	O
that	O
had	O
been	O
directed	O
at	O
it	O
.	O
</s>
<s>
In	O
addition	O
,	O
although	O
CherryOS	B-Application
supports	O
native	O
CD-ROM	O
installation	O
,	O
the	O
emulator	B-Application
itself	O
runs	O
a	O
bit	O
slower	O
than	O
PearPC	B-Operating_System
does	O
,	O
even	O
though	O
it	O
claims	O
to	O
run	O
three	O
times	O
faster	O
than	O
PearPC	B-Operating_System
.	O
</s>
