Gaiyan wrote:
No viruses for OS X.
There were viruses for Classic, and there's now the one actual real-life OS X trojan (and its variants) going around in the wild. To succumb to that one you do have to click to install a "codec" you've never heard of.
Google "Zlob" and "DNSChanger" for info. It's unlikely you're infected.
There's also the potential for rogue Dashboard widgetry, which I forget the details of (was considered a gaping hole at the time, nothing ever really took advantage) and disabling Dashboard both avoids that and frees up some resources if you never intend to use it.
...
One 'par for the course' thing I ran into recently was a race condition or who-knows-what that resulted when a user accidentally tried to open about a dozen large zip files at once. The built-in unzip util stalled, and its UI has no close button or menu ('not quite an application' in Apple's mind, apparently), so I killed it and forgot about it.
Come back two weeks later, and while checking processes for unrelated reasons... it had left a few copies of 'ditto' running that apparently didn't die as child processes (seems said utility pipes to ditto to write its temporary files, go figure), and those were eating 30% CPU while doing nothing.
...
Safari can also get a bit squirrelly after enough use (not necessarily all in one session), which is why they put that 'Reset browser' item in its menu. I'm not sure what state information actually persists and bogs it down.