My iMac runs slow after several hours of use. I then run "repair permissions". This afternoon it took 21 minutes. Day before yesterday, 31 minutes. A knowledgeable Mac guy told me I could have one of three things wrong. 1. My new memory is defective ( it ran worse when I only had 1 gig and would often crash). 2. My motherboard is starting to fail. 3. My hard drive is starting to fail.
Any body know what to do?
Any body know what to do?