If youare on an older G4 with a 350 or 400 mhz we recommend you replace your processor with a 500mhz or faster.
For a G4 running OSX10.4 we recommend at least 20GB. With the enormously fat Applications etc, you would be quickly out of space.
A full install requires 3 GB of drive space (again 10.2). You need at least 256MB of ram, 384 or 512 is better. Realize now that you will actually be slowing down when you install X. That means of course you really should have 6GB available and 256MB or ram or more. Apple says a full install requires 128MB of ram and 3GB of drive space (10.2 requirements, other versions more). We recommend at least 512MB unless you don't mind waiting for the beach ball to spin. We are always happy to help, but please use the tech support 1-40 number. If you call with an OSX related question, please do us the courtesy of dialing on your dime. Updated 4-1-2013 Make sure you absolutely and solidly have a backup of all data before starting. Give us a call! OSX Install Notes for G4 Systems We can provide you options and software for your installation if you do have trouble. Why use reconditioned equipment? See the Mac Comparison Chart ! All large orders have to be signed for. Need hardware help? Read Bob's Mac Tech Tips. Prices subject to change with out notice. Remember our bottom line price includes shipping! We stand behind the products we sell with a 30 day warranty less shipping and handling ( 90 day warranty on systems ). Installing OSX on your PowerMac G4 ORDER SECURELY ONLINE! OR give us a call on the toll free order line 87 9-6 CST, M-F (40 in Oklahoma or outside U.S.) 40 tech support NEW FAX 40.