After looking around for some tips on speeding up Leopard (I just installed it on a 700MHz Mac), I found this really interesting article. With 2 Terminal commands, you can really speed up Leopard. Do this in addition to the other optimizations and you have a really speedy computer. I'm sure there's many members here who know about this already, but I thought I'd share it for the members who don't know. I hope this helps! My iMac is now really fast and I think I could easily use it as my daily driver (seriously!). Here are the commands: sudo defaults write /Library/Preferences/com.apple.windowserver Compositor -dict deferredUpdates 0 disables BeamSync. Don't do this one if you are using a CRT (eMac, for example). sudo defaults write /Library/Preferences/com.apple.windowserver QuartzGLEnabled -boolean YES Turns on QuartzGL. See the website for more information on what these do and the possible problems you could run into (there aren't many, nothing serious. Read the webpage).