Hello everyone, I'm new here and I need to ask for some help with upgrading two iMac 8.1's at work. They a 2.8 Dual Cores with 500Gb drives, one is on OSX Leopard, the other on Snow Leopard. I'm an IT tech with 20 years' experience in a Windows environment but Mac OSX is still fairly new to me. I need to bring these two machine into parallel with each other - same OS / app versions etc. What would my upgrade to Mountain Lion be ? Am I correct in thinking L > SL > ML and SL > ML ? I'm thinking of upgrading the HDDs in these machines - can I take a 'clone' image of the machines as they are and then reimage back to a blank new HDD ( I'm thinking of SSD - any recommendations here ? ) and then upgrade the OS on each after the new drives / reimage. The machines are both on 4Gb of RAM - is there any benefit to taking these to 6Gb ? Given the scenario of two machines with identical hardware spec but different software versions, could anyone recommend an upgrade path any better / different to what I've outlined here ? Sorry for all the questions but I'm leaving my job soon and I would like to wrap this one job up before I go. Thanks all !