No need for software if you really only have a gig of ram installed. Easiest way to check would be the activity monitor app in your utilities folder (located in your app folder). Run that while you do your normal computing and see if the ram/CPU are maxed. With a 2.4Ghz processor, I'd imagine the backup is your memory. You can always correct the permissions by going to Disc Utility in the same Utility folder. This may help correct some issues.is there a way to be sure
some kind of software that determine the bottle neck of a system.
Put it to you this way - my iMac at home (specs below) is basically identical to my work one, save that its a 17" white and not a 20" aluminum. The only real difference is that I have 3GB of RAM. Unless I'm running an XP virtual machine, I rarely, if ever, hit my RAM ceiling. Memory makes ALL the difference.i always have around 100mb free memory available and cpu isn't maxed out at all. it runs at 10% most of the time.
100MB isn't a lot of wiggle room if you ask me...I'd say you probably bump against the memory ceiling so to speak. Did you try to correct the permissions? I'm not familiar with how easy it is to upgrade the memory for this model iMac, but I'd imagine it's a pretty easy/quick/cheap fix to throw in a new card and find out if that's what's holding you back. You can't even buy a netbook these days with only a gig of ram....(hell, WIN7 requires 2GB just for the operating system!).i always have around 100mb free memory available and cpu isn't maxed out at all. it runs at 10% most of the time.
I think you can do this without booting up from a CD, but booting from an external source may be better....how can i do this?
i'm going to upgrade ram i just wanted to make sure it is the real issue.