I have an older Macbook that I'm really hoping to get another year out of. But, it's slowing down BIG time. Apps run slow (Firefox, Safari, Email etc.), the spinning beachball of death makes a regular appearance. I've even had a few unexplained kernel panics. I've replaced the hard drive with a brand new one. I replaced the RAM with new RAM. I repair permissions and clean caches etc. I've cleaned out everything I can on the system (it's got more than 25% free space). I've uninstalled unused apps. I've turned off animations, turned off spotlight etc. I don't use it for anything more than internet, email and documents. It's a late 2008 Macbook 2 GHz duo, running OS 10.7.5 with 2 gigs of RAM. Is it running an operating system that's too new for it? When I upgraded to 10.7 I didn't do a clean install, so that's an option (I didn't want the hassle of reinstalling all apps). Should I try to back everything up, wipe the drive, install an older OS (which one? 10.6?) and then move need stuff over?