I have an old power mac 7600/132 running OS 8 that I use at the school where I teach, because it is the only mac in the building and I have years of curriculum and my preferred grade program on it. I am not a computer guy and especially not with macs and that is why I like it, if it is working you don't have to understand much, but when it isn't...no one even remembers using OS 8. Can I just upgrade to OS X? The machine came with OS 7.5 and I just ran a CD and it upgraded without losing any data or functionality. Is the jump to X to big of a change?