<s>
SIMBL	B-Operating_System
(	O
short	O
for	O
SIMple	O
Bundle	O
Loader	O
,	O
formerly	O
Smart	B-Operating_System
InputManager	I-Operating_System
Bundle	I-Operating_System
Loader	I-Operating_System
,	O
and	O
pronounced	O
like	O
symbol	O
or	O
cymbal	O
)	O
,	O
is	O
a	O
discontinued	O
application	O
enhancement	O
(	O
InputManager	O
bundle	O
)	O
loader	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
developed	O
by	O
Mike	O
Solomon	O
.	O
</s>
<s>
It	O
helps	O
third-party	O
developers	O
modify	O
and	O
add	O
functionality	O
to	O
applications	O
developed	O
with	O
the	O
Cocoa	B-Operating_System
environment	O
without	O
access	O
to	O
the	O
source	O
code	O
.	O
</s>
<s>
SIMBL	B-Operating_System
loads	O
code	O
via	O
the	O
InputManager	O
system	O
,	O
which	O
was	O
developed	O
to	O
support	O
foreign	O
input	O
methods	O
.	O
</s>
<s>
Plugins	B-Application
using	O
SIMBL	B-Operating_System
have	O
advantages	O
over	O
normal	O
InputManager	O
modifications	O
such	O
as	O
targeted	O
code	O
loading	O
into	O
specific	O
applications	O
.	O
</s>
<s>
Designed	O
for	O
Solomon	O
's	O
PithHelmet	O
,	O
SIMBL	B-Operating_System
is	O
now	O
used	O
by	O
other	O
developers	O
.	O
</s>
<s>
The	O
most	O
popular	O
use	O
of	O
SIMBL	B-Operating_System
is	O
to	O
add	O
functionality	O
to	O
the	O
Apple	B-Application
Safari	I-Application
web	B-Application
browser	I-Application
which	O
did	O
not	O
have	O
an	O
Apple-authorized	O
plugin	B-Application
system	O
until	O
version	O
5	O
in	O
2010	O
.	O
</s>
<s>
SIMBL	B-Operating_System
was	O
developed	O
in	O
response	O
to	O
the	O
restrictive	O
licensing	O
and	O
costs	O
of	O
Application	O
Enhancer	O
and	O
the	O
drawbacks	O
of	O
loading	O
code	O
blindly	O
through	O
the	O
InputManager	O
mechanism	O
.	O
</s>
<s>
SIMBL	B-Operating_System
is	O
installed	O
like	O
any	O
other	O
InputManager	O
.	O
</s>
<s>
As	O
such	O
,	O
it	O
is	O
restricted	O
to	O
certain	O
locations	O
depending	O
on	O
the	O
version	O
of	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
installed	O
.	O
</s>
<s>
In	O
versions	O
of	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
prior	O
to	O
Leopard	B-Application
,	O
SIMBL	B-Operating_System
could	O
be	O
installed	O
per-user	O
.	O
</s>
<s>
In	O
plugin	B-Application
installations	O
,	O
the	O
SIMBL	B-Operating_System
package	O
is	O
automatically	O
installed	O
.	O
</s>
<s>
Since	O
SIMBL	B-Operating_System
injects	O
code	O
into	O
running	O
processes	O
,	O
buggy	O
plugins	B-Application
can	O
cause	O
process	O
-	O
or	O
even	O
systemwide	O
problems	O
.	O
</s>
<s>
Plugins	B-Application
for	O
SIMBL	B-Operating_System
are	O
Cocoa	B-Operating_System
bundles	O
that	O
add	O
various	O
functionality	O
to	O
Cocoa	B-Operating_System
applications	O
.	O
</s>
<s>
They	O
can	O
be	O
placed	O
by	O
the	O
user	O
manually	O
through	O
Finder	B-Application
or	O
by	O
an	O
installer	O
to	O
/Library/Application	O
Support/SIMBL/Plugins	O
.	O
</s>
<s>
SIMBL	B-Operating_System
bundles	O
may	O
be	O
disabled	O
by	O
removing	O
the	O
plugin	B-Application
and	O
restarting	O
the	O
application	O
.	O
</s>
<s>
Also	O
,	O
the	O
normal	O
InputManager	O
mechanism	O
is	O
loaded	O
for	O
all	O
Cocoa	B-Operating_System
applications	O
,	O
providing	O
the	O
possibility	O
of	O
incompatibility	O
and	O
unexpected	O
application	O
behavior	O
.	O
</s>
<s>
SIMBL	B-Operating_System
only	O
loads	O
bundles	O
for	O
specific	O
and	O
identified	O
applications	O
.	O
</s>
<s>
Leopard	B-Application
restrictions	O
on	O
InputManager	O
plugins	B-Application
mean	O
their	O
installation	O
can	O
only	O
be	O
done	O
system-wide	O
.	O
</s>
<s>
SIMBL	B-Operating_System
plugins	B-Application
may	O
be	O
installed	O
per-user	O
if	O
SIMBL	B-Operating_System
is	O
installed	O
system-wide	O
.	O
</s>
<s>
SIMBL	B-Operating_System
plugins	B-Application
must	O
specify	O
which	O
versions	O
of	O
the	O
application	O
that	O
they	O
will	O
run	O
with	O
;	O
running	O
a	O
more	O
recent	O
version	O
of	O
the	O
application	O
with	O
the	O
plugin	B-Application
activated	O
will	O
cause	O
an	O
error	O
dialog	O
to	O
appear	O
.	O
</s>
<s>
Like	O
all	O
unsupported	O
hacks	O
,	O
the	O
amount	O
of	O
work	O
required	O
to	O
update	O
a	O
plugin	B-Application
depends	O
on	O
the	O
size	O
of	O
the	O
update	O
.	O
</s>
<s>
Development	O
of	O
SIMBL	B-Operating_System
plugins	B-Application
require	O
knowledge	O
of	O
Cocoa	B-Operating_System
reverse-engineering	O
.	O
</s>
<s>
SIMBL	B-Operating_System
works	O
only	O
with	O
Cocoa	B-Operating_System
applications	O
,	O
not	O
Carbon	B-Operating_System
or	O
other	O
kinds	O
of	O
applications	O
.	O
</s>
<s>
No	O
licensing	O
payment	O
is	O
required	O
to	O
use	O
SIMBL	B-Operating_System
,	O
unlike	O
APE	O
,	O
although	O
a	O
donation	O
is	O
suggested	O
.	O
</s>
<s>
The	O
source	O
to	O
SIMBL	B-Operating_System
is	O
also	O
freely	O
available	O
.	O
</s>
