I had a question regarding updating the OS on a mid-2007 imac, I got this imac from a friend. It has the original MAC OS out at the time....according to apple.com this imac can be updated to the latest Mavericks software. Question is do I have to update the OS in steps? For example, upg to snow leopard, lion, mountain lion, mavericks or can i go straight to mavericks? Keep in mind I don't need any information saved or backed up so i don't care about losing anything on this iMac. Please advise, thanks.