Sorry - what I'm trying to say is that iit seems as though the Mac keeps locking all of the time. If I'm changing from one tab to another, the pinwheel just comes up before loading the page. Sort of like a time out gesture. I'm pressuming I have enough memory on here not to lock it up.
You can tell I'm not technical can't you?
Is this a question about Final Cut Express or one about your iMac's performance?
Because this is a user forum meant to help other Final Cut users.
If it is a general issue pertaining to your computer, you should post it in the IMac forum here.
(They will want more details about your system and how you're using it as well.)