Hello. I currently own an iMac G5 purchased on eBay 2 1/2 to 3 yrs ago. It did not come with any CD's. However, it was loaded with the usual apps. I am currently running OS 10.5.8. I believe it is the first of the Lion apps. I am experiencing multiple download problems. I'm thinking that I need to upgrade to a later system. Can I upgrade to "Mountain Lion" or "Snow Leopard"? Would this possibly solve my problem? I am looking for any in-put on this matter. This is my first machine with all the new apps & gadgets. I previously and still own a G4 "Mirrored Door" Power Mac. Please help. Thanks ever so much.