My mac gets slow when I play music from my iTunes library

Hi, aproximately six months ago I noticed that everytime I play music from my iTunes library that its stored in my 27" iMac's hard drive, the computer gets slow, the images start to flicker, the animatios on the dock and the one when u minimize or maximaze the windows, also flicker. As soon as I close iTunes the computer works fine again. When I play music from a CD this doesn't happen.
I've taken the iMac to two service providers along theese 6 months and neighther have been able to fix the issue. What they have diagnozed is an issue with the hard drive which has been changed 4 times already.
What could be the issue?

Basic troubleshooting from the User's Guide is reset, restart, restore (first from backup then as new).  Try each of these in order until the issue is resolved.

Similar Messages

Maybe you are looking for