I've recently purchased a used power mac APG g4 400mhz that had 512mg ram I now that I know what program that I want to run the studio pro logic 9 I've expanded the ram to 1k but I'm running OSX 10.3 I need to run OSX 10.5 or better question is can this computer be upgraded to 10.5 and is the speed fast enough I don't want to waste my time and hard earned cash if it won't help I was thinking about getting a refurbished mac g5 once again if anybody can help me out I would appreciate it from one musician to another