Hello Everyone, I am really stuck with my Mac Mini and in desperate need of advice. I have a Mid 2007 Mac Mini. Model number A1176 (EMC 2108). I have been trying to install Lion or Mountain Lion, or any OS version that would allow me to use it properly. I have increased the RAM to 4GB from 1GB. I have installed a new Hard Drive. However, everything I do to install a new OS version fails. I have tried CMD + R route. I have tried the "Alt" route. I have tried to install via CD/DVD. I have even loaded OS through another computer, and then moved the hard disk into the Mac Mini, even then it won't accept it! Just to give you some background information, my Mac Mini was very slow, and it wouldn't allow me to install any of the current browser versions like Chrome or FireFox, and I could not longer play YouTube, BBC iPlayer, Netflix etc properly because it would give me the message to say my browser is not supported. Where am I going wrong? Am I missing something very obvious? I have spent a lot of time on this now, and I am getting really frustrated. I would really appreciate some help from anyone who has done this before. The only thing I can think of is that this model is not designed or is not allowed to upgrade to a newer OS version, which would seem strange to me because I have seen same age MacBooks run the Mountain Lion and Lion. I have spent all this money on memory and Hard Disk and I don't want into be wasted.