<s>
The	O
MacMag	B-Operating_System
virus	O
,	O
also	O
known	O
by	O
various	O
other	O
names	O
,	O
is	O
a	O
computer	O
virus	O
introduced	O
in	O
1988	O
by	O
Richard	B-Operating_System
Brandow	I-Operating_System
,	O
who	O
at	O
the	O
time	O
was	O
editor	O
and	O
publisher	O
of	O
MacMag	B-Operating_System
computer	O
magazine	O
in	O
Montréal	O
.	O
</s>
<s>
The	O
virus	O
infects	O
classic	O
Macintosh	B-Device
computers	O
,	O
and	O
the	O
intention	O
was	O
that	O
on	O
2	O
March	O
1988	O
all	O
infected	O
computers	O
would	O
show	O
the	O
message	O
"	O
RICHARD	B-Operating_System
BRANDOW	I-Operating_System
,	O
publisher	O
of	O
MacMag	B-Operating_System
,	O
and	O
its	O
entire	O
staff	O
would	O
like	O
to	O
take	O
this	O
opportunity	O
to	O
convey	O
their	O
UNIVERSAL	O
MESSAGE	O
OF	O
PEACE	O
to	O
all	O
Macintosh	B-Device
users	O
around	O
the	O
world	O
"	O
,	O
and	O
the	O
virus	O
would	O
then	O
delete	O
itself	O
.	O
</s>
<s>
The	O
program	O
then	O
copied	O
itself	O
onto	O
any	O
bootable	B-Operating_System
disk	I-Operating_System
which	O
was	O
opened	O
.	O
</s>
<s>
However	O
a	O
bug	B-Error_Name
in	O
the	O
virus	O
caused	O
infected	O
Mac	O
II	O
computers	O
to	O
undergo	O
system	O
crashes	O
before	O
this	O
date	O
.	O
</s>
<s>
Another	O
bug	B-Error_Name
,	O
which	O
affected	O
very	O
few	O
users	O
,	O
caused	O
files	O
other	O
than	O
the	O
original	O
virus	O
to	O
be	O
deleted	O
during	O
the	O
termination	O
stage	O
.	O
</s>
<s>
The	O
virus	O
infected	O
Aldus	O
Corporation	O
's	O
FreeHand	B-Application
,	O
and	O
Aldus	O
had	O
to	O
recall	O
thousands	O
of	O
copies	O
of	O
FreeHand	B-Application
,	O
leading	O
them	O
to	O
threaten	O
legal	O
action	O
.	O
</s>
