<s>
ResEdit	B-Operating_System
is	O
a	O
discontinued	O
developer	O
tool	O
application	B-Application
for	O
the	O
Apple	O
Macintosh	B-Device
,	O
used	O
to	O
create	O
and	O
edit	O
resources	O
directly	O
in	O
the	O
Mac	O
's	O
resource	B-Operating_System
fork	I-Operating_System
architecture	O
.	O
</s>
<s>
It	O
was	O
an	O
alternative	O
to	O
tools	O
such	O
as	O
REdit	O
,	O
and	O
the	O
resource	O
compiler	B-Language
Rez	O
.	O
</s>
<s>
For	O
the	O
average	O
user	O
,	O
ResEdit	B-Operating_System
was	O
generally	O
easier	O
to	O
use	O
,	O
because	O
it	O
used	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
.	O
</s>
<s>
Although	O
it	O
had	O
been	O
intended	O
to	O
be	O
a	O
developer	O
tool	O
,	O
power	B-General_Concept
users	I-General_Concept
often	O
used	O
it	O
to	O
edit	O
icons	O
,	O
menus	O
,	O
and	O
other	O
elements	O
of	O
an	O
application	B-Application
's	O
GUI	B-Application
,	O
customizing	O
it	O
to	O
their	O
own	O
preferences	O
.	O
</s>
<s>
Resources	O
on	O
the	O
Macintosh	B-Device
could	O
be	O
of	O
many	O
different	O
types	O
,	O
and	O
in	O
fact	O
any	O
arbitrary	O
data	O
could	O
be	O
turned	O
into	O
a	O
resource	O
.	O
</s>
<s>
While	O
the	O
system	B-Operating_System
defined	O
many	O
standard	O
formats	O
for	O
particular	O
kinds	O
of	O
resources	O
(	O
for	O
example	O
,	O
an	O
icon	O
,	O
or	O
a	O
window	O
template	O
)	O
,	O
programmers	O
were	O
also	O
free	O
to	O
define	O
their	O
own	O
.	O
</s>
<s>
ResEdit	B-Operating_System
included	O
support	O
for	O
editing	O
many	O
of	O
the	O
standard	O
types	O
and	O
for	O
creating	O
arbitrary	O
resources	O
with	O
any	O
structure	O
a	O
programmer	O
saw	O
fit	O
.	O
</s>
<s>
ResEdit	B-Operating_System
was	O
one	O
of	O
the	O
earliest	O
examples	O
of	O
a	O
GUI	B-Application
layout	O
tool	O
,	O
an	O
essential	O
component	O
for	O
rapid	O
application	B-Application
development	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
defined	O
a	O
standard	O
resource	O
called	O
a	O
dialog	O
template	O
and	O
a	O
dialog	O
items	O
list	O
(	O
resource	O
types	O
'	O
DLOG	O
 '	O
and	O
'	O
DITL	O
 '	O
respectively	O
)	O
.	O
</s>
<s>
In	O
ResEdit	B-Operating_System
,	O
it	O
was	O
possible	O
to	O
simply	O
create	O
these	O
types	O
and	O
add	O
GUI	B-Application
elements	O
to	O
them	O
in	O
an	O
almost	O
WYSIWYG	B-Application
fashion	O
,	O
such	O
that	O
a	O
user	O
interface	O
could	O
be	O
designed	O
directly	O
as	O
it	O
would	O
appear	O
to	O
the	O
end	O
user	O
of	O
the	O
application	B-Application
.	O
</s>
<s>
Later	O
,	O
the	O
application	B-Application
code	O
could	O
create	O
a	O
functional	O
dialog	O
box	O
using	O
the	O
stored	O
resource	O
data	O
which	O
matches	O
the	O
appearance	O
you	O
lay	O
out	O
in	O
ResEdit	B-Operating_System
.	O
</s>
<s>
When	O
ResEdit	B-Operating_System
first	O
appeared	O
in	O
the	O
mid-1980s	O
,	O
this	O
was	O
a	O
revolutionary	O
innovation	O
,	O
today	O
it	O
is	O
commonplace	O
for	O
programmers	O
.	O
</s>
<s>
ResEdit	B-Operating_System
includes	O
standard	O
editors	O
for	O
window	O
templates	O
(	O
WIND	O
)	O
,	O
menus	O
(	O
MENU	O
)	O
,	O
dialog	O
boxes	O
,	O
controls	O
(	O
CNTL	O
)	O
,	O
color	O
palettes	O
(	O
clut	O
and	O
pltt	O
)	O
,	O
icons	O
(	O
ICON	O
,	O
cicn	O
,	O
ICN#	O
)	O
,	O
and	O
various	O
other	O
standard	O
types	O
.	O
</s>
<s>
One	O
of	O
ResEdit	B-Operating_System
's	O
most	O
powerful	O
features	O
(	O
which	O
first	O
appeared	O
with	O
ResEdit	B-Operating_System
version	O
2.0	O
)	O
is	O
the	O
ability	O
to	O
define	O
arbitrary	O
data	O
structures	O
as	O
resources	O
using	O
a	O
simple	O
template	O
building	O
feature	O
.	O
</s>
<s>
This	O
template	O
allows	O
ResEdit	B-Operating_System
to	O
build	O
a	O
GUI	B-Application
editor	O
on	O
the	O
fly	O
that	O
allows	O
entry	O
of	O
data	O
and	O
package	O
it	O
into	O
the	O
structure	O
defined	O
in	O
the	O
template	O
.	O
</s>
<s>
ResEdit	B-Operating_System
includes	O
a	O
number	O
of	O
predefined	O
templates	O
for	O
many	O
standard	O
OS	O
resources	O
that	O
do	O
not	O
require	O
a	O
graphical	O
editor	O
.	O
</s>
<s>
ResEdit	B-Operating_System
was	O
never	O
upgraded	O
to	O
run	O
natively	O
on	O
PowerPC-based	O
Macintoshes	B-Device
after	O
the	O
migration	O
from	O
Motorola	B-Device
68000	I-Device
series	I-Device
,	O
and	O
not	O
on	O
Mac	B-Application
OS	I-Application
X	I-Application
.	O
Apple	O
now	O
discourages	O
the	O
use	O
of	O
resource	B-Operating_System
forks	I-Operating_System
in	O
new	O
macOS	B-Application
applications	O
,	O
preferring	O
the	O
more	O
portable	O
NeXT-derived	O
application	B-Application
bundles	O
.	O
</s>
<s>
A	O
long-standing	O
third-party	O
commercial	O
alternative	O
named	O
Resorcerer	B-Application
remains	O
available.	O
,	O
and	O
more	O
recently	O
there	O
have	O
been	O
a	O
number	O
of	O
attempts	O
to	O
build	O
open-source	O
macOS-native	O
resource	O
editors	O
,	O
including	O
one	O
called	O
ResKnife	B-Language
.	O
</s>
<s>
ResEdit	B-Operating_System
will	O
run	O
in	O
Mac	B-Application
OS	I-Application
X	I-Application
's	O
Classic	O
compatibility	O
mode	O
,	O
but	O
Classic	O
is	O
neither	O
available	O
on	O
Intel	B-Device
Macintosh	I-Device
computers	I-Device
,	O
nor	O
in	O
Mac	B-Application
OS	I-Application
X	I-Application
v10.5	I-Application
or	O
later	O
.	O
</s>
<s>
However	O
,	O
an	O
Intel	B-Device
Mac	I-Device
can	O
run	O
ResEdit	B-Operating_System
via	O
an	O
emulator	O
such	O
as	O
SheepShaver	B-Application
or	O
Basilisk	B-Application
II	I-Application
.	O
</s>
<s>
The	O
last	O
official	O
version	O
of	O
ResEdit	B-Operating_System
is	O
2.1.3	O
,	O
released	O
in	O
August	O
1994	O
.	O
</s>
<s>
Unofficial	O
hacks	O
released	O
as	O
ResEdit	B-Operating_System
2.1.4	O
and	O
later	O
exist	O
,	O
adding	O
features	O
such	O
as	O
a	O
decompiler	B-Application
and	O
the	O
ability	O
to	O
edit	O
data	B-Operating_System
forks	I-Operating_System
,	O
but	O
these	O
are	O
unsupported	O
by	O
Apple	O
.	O
</s>
