Normally, this list isn't where I would pose this question. But here at Illinois we're seeing enough instances of a particular Mac problem that we're starting to wonder if there isn't a bit of nasty Mac malware out in the wild that isn't being reported
on. So I thought I'd consult with the security experts.
We're seeing Macs that over a period of several weeks start having performance issues, applications start crashing more frequently, and eventually after a few weeks of this, the computer freezes up completely requiring reboots.
Then, the Mac will fail to make it through startup and will freeze on a flashing icon of a file folder with a question mark. Running Disk Utility from a startup disc doesn't help, because the HD is not visible.
Wiping the drive and reinstalling the OS works for a time, but then the problem...