Hi Everyone! This is my first time posting, I have been lurking for a while . I have a question, I bought a Mac Pro (1,1) Dual Core Intel Xeon back in 2008, not knowing that this machine would pretty much become obsolete by 2013. What sucked was I had bought this machine to replace my previous one that had become obsolete when Mac went over to Intel technology. I have found some good information about how to upgrade my CPU and am going to attempt that in the near future. But for right now, I just want to upgrade my OS to Lion (not Mountain Lion) and was given two different answers. A guy at a local Apple dealer told me I could upgrade to Lion but when I called to order Lion from Apple, the guy told me my computer wasn't eligible. This didn't make sense because I bought this computer with Snow Leopard on it, so I have a hard time processing that I can't go up at least one more OS. I'm looking for the definitive answer. Can I upgrade to Lion? I am about to order some memory and I don't want to waste my time if my computer will only be barely relevant for another 6 months or so. Thanks!!!