<s>
MacRuby	B-Operating_System
is	O
a	O
discontinued	O
implementation	O
of	O
the	O
Ruby	B-Language
language	I-Language
that	O
ran	O
on	O
the	O
Objective-C	B-Language
runtime	O
and	O
CoreFoundation	B-Operating_System
framework	O
under	O
development	O
by	O
Apple	O
Inc	O
.	O
which	O
"	O
was	O
supposed	O
to	O
replace	O
RubyCocoa	B-Operating_System
"	O
.	O
</s>
<s>
It	O
targeted	O
Ruby	B-Language
1.9	O
and	O
used	O
the	O
high	O
performance	O
LLVM	B-Application
compiler	O
infrastructure	O
starting	O
with	O
version	O
0.5	O
.	O
</s>
<s>
It	O
supports	O
both	O
ahead-of-time	B-Application
and	O
just-in-time	O
compilation	O
.	O
</s>
<s>
MacRuby	B-Operating_System
supported	O
Interface	O
Builder	O
and	O
shipped	O
with	O
a	O
core	O
library	O
called	O
HotCocoa	O
to	O
simplify	O
Cocoa	B-Operating_System
programming	I-Operating_System
.	O
</s>
<s>
MacRuby	B-Operating_System
was	O
also	O
used	O
as	O
an	O
embedded	O
scripting	O
language	O
for	O
Objective-C	B-Language
applications	O
.	O
</s>
<s>
In	O
May	O
2012	O
,	O
Laurent	O
Sansonetti	O
announced	O
RubyMotion	B-Application
,	O
a	O
port	O
of	O
MacRuby	B-Operating_System
for	O
iOS	B-Application
,	O
OS	B-Operating_System
X	I-Operating_System
and	O
Android	B-Application
.	O
</s>
<s>
Development	O
on	O
MacRuby	B-Operating_System
effectively	O
ended	O
in	O
late	O
2011	O
,	O
coinciding	O
with	O
the	O
principal	O
author	O
's	O
departure	O
from	O
Apple	O
Inc	O
.	O
As	O
of	O
Jan	O
5	O
2015	O
,	O
The	O
MacRuby	B-Operating_System
project	O
is	O
no	O
longer	O
under	O
active	O
development	O
;	O
MacRuby	B-Operating_System
does	O
not	O
work	O
on	O
Mavericks	O
,	O
the	O
team	O
having	O
shifted	O
their	O
focus	O
to	O
a	O
commercial	O
RubyMotion	B-Application
product	O
for	O
iOS	B-Application
and	O
OS	B-Operating_System
X	I-Operating_System
.	O
</s>
<s>
MacRuby	B-Operating_System
was	O
originally	O
called	O
"	O
ruby+objc	O
"	O
and	O
was	O
developed	O
by	O
Laurent	O
Sansonetti	O
,	O
who	O
began	O
work	O
on	O
it	O
in	O
late	O
2007	O
.	O
</s>
<s>
In	O
March	O
2008	O
,	O
the	O
first	O
publicly	O
available	O
version	O
,	O
MacRuby	B-Operating_System
0.1	O
,	O
was	O
announced	O
on	O
the	O
official	O
RubyTalk	O
forum	O
.	O
</s>
<s>
Version	O
0.2	O
was	O
released	O
in	O
June	O
2008	O
,	O
and	O
implemented	O
Ruby	B-Language
strings	O
,	O
arrays	O
and	O
hashes	O
as	O
native	O
Cocoa	B-Operating_System
types	O
.	O
</s>
<s>
In	O
September	O
2008	O
,	O
MacRuby	B-Operating_System
0.3	O
was	O
released	O
and	O
included	O
the	O
HotCocoa	O
library	O
as	O
well	O
as	O
several	O
HotCocoa	O
example	O
programs	O
.	O
</s>
<s>
In	O
October	O
2008	O
,	O
Apple	O
created	O
its	O
first	O
MacRuby	B-Operating_System
page	O
on	O
its	O
Developer	O
Connection	O
website	O
.	O
</s>
<s>
MacRuby	B-Operating_System
0.4	O
was	O
released	O
in	O
March	O
2009	O
,	O
MacRuby	B-Operating_System
0.5	O
,	O
0.6	O
,	O
0.7	O
in	O
January	O
,	O
May	O
and	O
October	O
2010	O
respectively	O
.	O
</s>
<s>
MacRuby	B-Operating_System
0.8	O
,	O
was	O
released	O
on	O
December	O
13	O
,	O
2010	O
,	O
0.9	O
on	O
February	O
25	O
,	O
2011	O
0.10	O
on	O
March	O
23	O
,	O
2011	O
,	O
0.11	O
on	O
October	O
17	O
,	O
2011	O
,	O
0.12	O
on	O
June	O
11	O
,	O
2012	O
.	O
</s>
