Hello. Mac noob here. I have an iBook G3 (dual USB, 10GB hard drive, 576 MB RAM), running OS X (10.1.5), and am in the process of trimming the contents of the hard drive. Ive been wondering: Do I need OS 9 (and its apps)? I know that OS 9 is needed to run older apps on OS X, but is it a must-have for OS X version 10.1.5 to run (properly, these days)? If anyone has any tips on trimming the OS, please, do share them. Note: I do not have any install discs, nor do I plan on upgrading the OS.