<s>
The	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Public	I-Operating_System
Beta	I-Operating_System
(	O
internally	O
code	O
named	O
"	O
Kodiak	O
"	O
)	O
was	O
the	O
first	O
publicly	O
available	O
version	O
of	O
Apple	O
Computer	O
's	O
Mac	B-Application
OS	I-Application
X	I-Application
(	O
now	O
named	O
macOS	B-Application
)	O
operating	B-General_Concept
system	I-General_Concept
to	O
feature	O
the	O
Aqua	B-Application
user	I-Application
interface	I-Application
.	O
</s>
<s>
Its	O
release	O
was	O
significant	O
as	O
the	O
first	O
publicly	O
available	O
evidence	O
of	O
Apple	O
's	O
ability	O
to	O
ship	O
the	O
long-awaited	O
"	O
next-generation	O
Mac	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
"	O
after	O
the	O
Copland	B-Application
failure	O
.	O
</s>
<s>
It	O
allowed	O
software	B-Application
developers	I-Application
and	O
early	O
adopters	O
to	O
test	O
a	O
preview	B-Language
of	O
the	O
upcoming	O
operating	B-General_Concept
system	I-General_Concept
and	O
develop	O
software	O
for	O
it	O
before	O
its	O
final	O
release	O
.	O
</s>
<s>
It	O
is	O
the	O
only	O
public	O
version	O
of	O
Mac	B-Application
OS	I-Application
X	I-Application
to	O
have	O
a	O
code	O
name	O
not	O
based	O
on	O
a	O
big	O
cat	O
until	O
the	O
release	O
of	O
10.9	B-Operating_System
Mavericks	I-Operating_System
in	O
2013	O
.	O
</s>
<s>
The	O
Public	O
Beta	O
succeeded	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Server	I-Operating_System
1.0	I-Operating_System
,	O
the	O
first	O
public	O
release	O
of	O
Apple	O
's	O
new	O
NeXT	O
OPENSTEP-based	O
operating	B-General_Concept
system	I-General_Concept
,	O
which	O
used	O
a	O
variant	O
of	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
's	O
"	O
Platinum	O
"	O
user	O
interface	O
look	O
and	O
feel	O
.	O
</s>
<s>
The	O
Public	O
Beta	O
introduced	O
the	O
Aqua	B-Application
user	I-Application
interface	I-Application
to	O
the	O
world	O
.	O
</s>
<s>
The	O
beta	O
's	O
arrival	O
marked	O
some	O
fundamental	O
technical	O
changes	O
,	O
most	O
courtesy	O
of	O
an	O
open	B-Application
source	I-Application
Darwin	B-Operating_System
1.2.1	O
core	O
,	O
including	O
two	O
features	O
that	O
Mac	O
users	O
and	O
developers	B-Application
had	O
been	O
anticipating	O
for	O
almost	O
a	O
decade	O
:	O
preemptive	O
multitasking	O
and	O
protected	B-General_Concept
memory	I-General_Concept
.	O
</s>
<s>
The	O
Public	O
Beta	O
included	O
many	O
of	O
the	O
standard	O
programs	O
bundled	O
with	O
macOS	B-Application
for	O
decades	O
to	O
come	O
,	O
such	O
as	O
TextEdit	B-Application
,	O
Preview	B-Language
,	O
Mail	B-Operating_System
,	O
QuickTime	B-Application
Player	I-Application
and	O
Terminal	O
.	O
</s>
<s>
Also	O
included	O
with	O
the	O
Public	O
Beta	O
,	O
but	O
not	O
in	O
any	O
subsequent	O
versions	O
of	O
Mac	B-Application
OS	I-Application
X	I-Application
,	O
were	O
a	O
simple	O
MP3	O
player	O
(	O
iTunes	B-Operating_System
had	O
not	O
yet	O
been	O
introduced	O
)	O
,	O
Sketch	O
,	O
a	O
basic	O
vector	O
drawing	O
program	O
demonstrating	O
features	O
of	O
Quartz	O
,	O
and	O
HTMLEdit	O
,	O
a	O
WYSIWYG	B-Application
HTML	O
editor	O
inherited	O
from	O
WebObjects	B-Language
.	O
</s>
<s>
Native	O
shrinkware	B-Application
applications	O
were	O
few	O
and	O
far	O
between	O
.	O
</s>
<s>
Early	O
adopters	O
had	O
to	O
turn	O
to	O
open	B-Application
source	I-Application
or	O
shareware	B-License
alternatives	O
,	O
giving	O
rise	O
to	O
an	O
active	O
homebrew	O
software	O
community	O
around	O
the	O
new	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Many	O
programs	O
in	O
use	O
on	O
early	O
Mac	B-Application
OS	I-Application
X	I-Application
systems	O
were	O
inherited	O
from	O
OPENSTEP	B-Operating_System
or	O
Rhapsody	B-Operating_System
developer	B-Application
releases	O
(	O
e.g.	O
</s>
<s>
OmniWeb	B-Protocol
or	O
Fire	B-Protocol
)	O
,	O
or	O
were	O
simple	O
wrapper	B-Library
apps	O
that	O
provided	O
a	O
graphical	O
interface	O
to	O
a	O
command-line	O
Unix	O
program	O
.	O
</s>
<s>
The	O
poor	O
state	O
of	O
the	O
Carbon	B-Operating_System
API	I-Operating_System
contrasted	O
with	O
the	O
relative	O
maturity	O
of	O
Cocoa	B-Operating_System
gave	O
rise	O
to	O
an	O
anti-Carbon	O
bias	O
among	O
Mac	B-Application
OS	I-Application
X	I-Application
users	O
.	O
</s>
<s>
The	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Public	I-Operating_System
Beta	I-Operating_System
was	O
expired	O
on	O
May	O
14	O
,	O
2001	O
;	O
approximately	O
two	O
months	O
after	O
the	O
release	O
of	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
10.0	I-Operating_System
,	O
the	O
completed	O
version	O
of	O
the	O
operating	B-General_Concept
system	I-General_Concept
released	O
in	O
March	O
2001	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
it	O
will	O
not	O
run	O
on	O
later	O
PowerPC-based	O
Macintosh	B-Operating_System
computers	O
released	O
after	O
early	O
2001	O
,	O
nor	O
on	O
current	O
Macintosh	B-Operating_System
hardware	O
,	O
which	O
uses	O
the	O
x86	B-Operating_System
or	O
ARM64	B-Architecture
processor	O
architectures	O
.	O
</s>
<s>
Using	O
the	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Public	I-Operating_System
Beta	I-Operating_System
on	O
compatible	O
equipment	O
today	O
requires	O
setting	O
the	O
hardware	O
clock	O
to	O
a	O
date	O
prior	O
to	O
the	O
expiration	O
date	O
.	O
</s>
<s>
The	O
expiration	O
date	O
forced	O
users	O
to	O
purchase	O
a	O
copy	O
of	O
the	O
final	O
release	O
rather	O
than	O
continuing	O
to	O
use	O
the	O
Public	O
Beta	O
,	O
as	O
well	O
as	O
reassured	O
industry	O
observers	O
skeptical	O
after	O
the	O
Copland	B-Application
and	O
Rhapsody	B-Operating_System
failures	O
that	O
Apple	O
would	O
actually	O
release	O
a	O
next-generation	O
operating	B-General_Concept
system	I-General_Concept
this	O
time	O
.	O
</s>
<s>
Owners	O
of	O
the	O
Public	O
Beta	O
version	O
were	O
entitled	O
to	O
a	O
$30	O
discount	O
on	O
the	O
price	O
of	O
the	O
first	O
full	O
version	O
of	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
10.0	I-Operating_System
.	O
</s>
<s>
Only	O
the	O
Aqua	B-Application
GUI	I-Application
and	O
related	O
components	O
of	O
the	O
Public	O
Beta	O
were	O
subject	O
to	O
expiry	O
;	O
the	O
underlying	O
Darwin	B-Operating_System
command-line	O
based	O
OS	O
continued	O
to	O
function	O
.	O
</s>
