<s>
SheepShaver	B-Application
is	O
an	O
open-source	B-Application
PowerPC	B-Architecture
Apple	B-Device
Macintosh	I-Device
emulator	B-Application
originally	O
designed	O
for	O
BeOS	B-Application
and	O
Linux	B-Application
.	O
</s>
<s>
The	O
name	O
is	O
a	O
play	O
on	O
ShapeShifter	O
,	O
a	O
Macintosh	B-Device
II	I-Device
emulator	B-Application
for	O
AmigaOS	B-Application
(	O
made	O
obsolete	O
by	O
Basilisk	B-Application
II	I-Application
)	O
.	O
</s>
<s>
The	O
ShapeShifter	O
and	O
SheepShaver	B-Application
projects	O
were	O
originally	O
conceived	O
and	O
programmed	O
by	O
Christian	O
Bauer	O
.	O
</s>
<s>
However	O
,	O
currently	O
,	O
the	O
main	O
developer	O
behind	O
SheepShaver	B-Application
is	O
Gwenolé	O
Beauchesne	O
.	O
</s>
<s>
SheepShaver	B-Application
was	O
originally	O
commercial	O
software	O
when	O
first	O
released	O
in	O
1998	O
,	O
but	O
after	O
the	O
demise	O
of	O
Be	O
Inc.	O
,	O
the	O
maker	O
of	O
BeOS	B-Application
,	O
it	O
became	O
open	O
source	O
in	O
2002	O
.	O
</s>
<s>
It	O
can	O
be	O
run	O
on	O
both	O
PowerPC	B-Architecture
and	O
x86	B-Operating_System
systems	O
;	O
however	O
,	O
it	O
runs	O
more	O
slowly	O
on	O
an	O
x86	B-Operating_System
system	O
than	O
on	O
a	O
PowerPC	B-Architecture
system	O
,	O
because	O
of	O
the	O
translation	O
between	O
the	O
PowerPC	B-Architecture
and	O
Intel	B-Operating_System
x86	I-Operating_System
instruction	O
sets	O
.	O
</s>
<s>
SheepShaver	B-Application
has	O
also	O
been	O
ported	O
to	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
As	O
a	O
free	O
software	O
,	O
a	O
few	O
variants	O
exist	O
to	O
simplify	O
the	O
installation	O
process	O
on	O
Intel-based	O
Macs	B-Device
:	O
</s>
<s>
'	O
Chubby	O
Bunny	O
 '	O
also	O
simplifies	O
the	O
set	O
up	O
process	O
of	O
OS	B-Operating_System
9	I-Operating_System
visualization	O
on	O
Intel	O
Macs	B-Device
running	O
OS	B-Operating_System
X	I-Operating_System
.	O
</s>
<s>
SheepShaver	B-Application
is	O
capable	O
of	O
running	O
Mac	B-Application
OS	I-Application
7.5.2	O
through	O
9.0.4	O
(	O
though	O
it	O
needs	O
the	O
image	B-General_Concept
of	O
an	O
Old	B-Device
World	I-Device
ROM	I-Device
to	O
run	O
Mac	B-Application
OS	I-Application
8.1	O
or	O
below	O
)	O
,	O
and	O
can	O
be	O
run	O
inside	O
a	O
window	O
so	O
that	O
the	O
user	O
can	O
run	O
classic	B-Application
Mac	I-Application
OS	I-Application
and	O
either	O
BeOS	B-Application
,	O
Intel-based	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
Linux	B-Application
,	O
or	O
Windows	B-Application
applications	I-Application
at	O
the	O
same	O
time	O
.	O
</s>
<s>
Although	O
SheepShaver	B-Application
does	O
have	O
Ethernet	O
support	O
and	O
CD-quality	O
sound	O
output	O
,	O
it	O
does	O
not	O
emulate	O
the	O
memory	B-General_Concept
management	I-General_Concept
unit	I-General_Concept
.	O
</s>
<s>
While	O
adding	O
MMU	O
emulation	B-Application
has	O
been	O
discussed	O
,	O
the	O
feature	O
has	O
not	O
been	O
added	O
because	O
of	O
the	O
effort	O
required	O
in	O
implementing	O
it	O
,	O
the	O
impact	O
on	O
performance	O
it	O
will	O
have	O
and	O
the	O
lack	O
of	O
time	O
on	O
the	O
part	O
of	O
the	O
developers	O
.	O
</s>
