Within the last year I purchased an older eMac which had a 900 Mhz processor. One of the issues with trying to use those older Macs is that they do not meet the requirements of newer versions of OS X. There are, and they will make that old machine seem like it's younger and snappier than it ever did. Do you have an old Mac G3 or G4 lying around doing nothing? Did you know that old dinosaur could make a great server or desktop with the help of everyone's favorite open source operating system Linux? Most people don't realize there are Linux ports for PPC.