I have a g4 10.2.8 mac. Recently when i tried to boot it up, it got to the loading screen (grey screen with a clock and apple logo) and then didnt go any futher. I dont know why it wont boot up fully. iv been told so far to press down apple-V when powering up, i did this and it said something about - mach_init failed, errno 2. Does anybody know what this means? Please help!