[johnforr]

Yep, tried all that and all the things suggested in the sticky.

I'm not running iTunes in the background.

As someone else posted, this problem seems to fix itself & then re-appear....but it's so bad that it makes Protools completely unusable.

I'm wondering if upgrading either the Mac OS or Protools itself will help, but don't want to spend the money if I just end up with the same problem.

Any ideas would be VERY appreciated.