<s>
TeXShop	B-Language
is	O
a	O
free	B-Application
LaTeX	B-Application
and	O
TeX	B-Application
editor	O
and	O
previewer	O
for	O
macOS	B-Application
.	O
</s>
<s>
It	O
is	O
licensed	O
under	O
the	O
GNU	B-License
GPL	I-License
.	O
</s>
<s>
TeXShop	B-Language
was	O
developed	O
by	O
American	O
mathematician	O
Richard	O
Koch	O
.	O
</s>
<s>
It	O
was	O
modeled	O
on	O
NeXTstep	B-Application
's	O
bundled	O
TeXview.app	O
and	O
developed	O
for	O
the	O
then	O
new	O
macOS	B-Application
user	B-Application
interface	I-Application
Aqua	B-Application
and	O
capitalized	O
on	O
the	O
native	B-Application
PDF	I-Application
support	O
of	O
that	O
version	O
of	O
the	O
Macintosh	B-Device
operating	O
system	O
,	O
which	O
was	O
itself	O
based	O
on	O
NeXTSTEP	B-Application
's	O
successor	O
OPENSTEP	B-Operating_System
.	O
</s>
<s>
Mitsuhiro	O
Shishikura	O
added	O
a	O
Macro	O
editor	O
,	O
a	O
magnifying	O
glass	O
for	O
the	O
preview	O
window	O
,	O
and	O
the	O
ability	O
to	O
transfer	O
mathematical	O
expressions	O
directly	O
into	O
Keynote	B-Protocol
presentations	O
.	O
</s>
<s>
Lacking	O
the	O
TeX	B-Application
eq	O
→	O
eps	O
Service	O
which	O
TeXview	O
afforded	O
,	O
other	O
apps	O
such	O
as	O
LaTeXiT.app	O
were	O
developed	O
to	O
provide	O
Service	O
support	O
.	O
</s>
<s>
TeXShop	B-Language
requires	O
an	O
existing	O
TeX	B-Application
installation	O
and	O
is	O
currently	O
bundled	O
with	O
the	O
MacTeX	B-General_Concept
distribution	O
.	O
</s>
<s>
The	O
program	O
(	O
then	O
version	O
1.19	O
)	O
won	O
the	O
2002	O
Apple	O
Design	O
Award	O
of	O
Best	O
Mac	B-Device
Open	O
Source	O
Port	O
for	O
its	O
capability	O
to	O
display	O
scientific	O
and	O
technical	O
documents	O
created	O
in	O
TeX	B-Application
format	O
.	O
</s>
<s>
In	O
fact	O
,	O
TeXShop	B-Language
makes	O
it	O
possible	O
,	O
thanks	O
first	O
to	O
"	O
pdfsync.sty	O
"	O
,	O
to	O
switch	O
back	O
and	O
forth	O
between	O
code	O
and	O
preview	O
easily	O
,	O
jumping	O
at	O
a	O
corresponding	O
spot	O
,	O
simply	O
by	O
a	O
CMD-click	O
.	O
</s>
<s>
From	O
TeXShop	B-Language
1.35	O
onward	O
this	O
also	O
works	O
with	O
multipart	O
documents	O
,	O
which	O
are	O
joined	O
by	O
"	O
\include	O
 "	O
.	O
</s>
<s>
Also	O
,	O
with	O
version	O
1.35	O
TeXShop	B-Language
was	O
extended	O
with	O
XeTeX	B-Application
support	O
.	O
</s>
<s>
The	O
MacOS	B-Application
"	O
Tiger	O
"	O
version	O
of	O
TeXShop	B-Language
is	O
capable	O
of	O
jumping	O
from	O
preview	O
to	O
code	O
and	O
vice	O
versa	O
without	O
pdfsync.sty	O
,	O
using	O
the	O
PDF	B-Application
search	O
technology	O
built	O
into	O
Tiger	O
.	O
</s>
<s>
Starting	O
with	O
version	O
2.18	O
,	O
TeXShop	B-Language
also	O
has	O
included	O
support	O
for	O
SyncTeX	O
.	O
</s>
<s>
but	O
is	O
much	O
more	O
reliable	O
than	O
PDF	B-Application
search	O
,	O
especially	O
for	O
documents	O
that	O
include	O
mathematical	O
formulae	O
.	O
</s>
<s>
Version	O
2.26	O
in	O
universal	B-Operating_System
binary	I-Operating_System
(	O
PPC+x86	O
)	O
was	O
released	O
on	O
17	O
March	O
2009	O
,	O
requiring	O
Mac	B-Application
OS	I-Application
X	I-Application
10.4.3	I-Application
or	O
later	O
with	O
Mac	B-Application
OS	I-Application
X	O
10.5	O
recommended	O
.	O
</s>
<s>
Version	O
2.28	O
was	O
released	O
on	O
7	O
November	O
2009	O
as	O
part	O
of	O
the	O
TeX	B-General_Concept
Live	I-General_Concept
2009	O
release	O
of	O
MacTeX	B-General_Concept
.	O
</s>
<s>
For	O
users	O
of	O
Mac	B-Application
OS	I-Application
X	O
10.2	O
and	O
10.3	O
,	O
Release	O
1.43	O
remains	O
available	O
(	O
as	O
well	O
as	O
v1.35e	O
and	O
1.19	O
for	O
10.1.5	O
and	O
earlier	O
)	O
.	O
</s>
<s>
For	O
users	O
of	O
Mac	B-Application
OS	I-Application
X	I-Application
10.4	I-Application
through	O
10.6	O
,	O
Release	O
2.47	O
remains	O
available	O
(	O
10.5	O
or	O
higher	O
is	O
strongly	O
recommended	O
)	O
.	O
</s>
<s>
As	O
of	O
Release	O
3.39	O
,	O
a	O
new	O
TeXShop	B-Language
dock	O
icon	O
,	O
designed	O
by	O
Thiemo	O
Gamma	O
,	O
has	O
been	O
used	O
.	O
</s>
<s>
In	O
Finder	B-Application
,	O
TeXShop	B-Language
documents	O
will	O
still	O
use	O
the	O
original	O
icon	O
(	O
designed	O
by	O
Jérôme	O
Laurens	O
and	O
later	O
re-constructed	O
by	O
William	O
Adams	O
for	O
its	O
use	O
with	O
retina	O
displays	O
)	O
for	O
associated	O
LaTeX	B-Application
documents	O
.	O
</s>
