You can install Mac OS X Snow Leopard from Tiger without problem. First, check if your computer is supported > http://support.apple.com/kb/sp575 Buy Snow Leopard > http://store.apple.com/us/product/MC573/mac-os-x-106-snow-leopard Then, make a backup, insert the DVD and upgrade. Finally, open > Software Update and install the latest version.
Thanks for your reply. In the link, it states that I need a 64 bit Intel processor. I've checked everywhere, and I cannot find out if the Intel Core-Duo (not core-2-duo), is 64 bit or not. Do you know where I can learn about the processor that I have? My iMac is the first generation of iMacs built with Intel processors if that helps.