I'm about to purchase an iMac 27" (Mid 2010) and I'm wondering (worried) if this will be able to be the same as a brand new one-of course not the look or even the speed or the retina display, but the software- would I be able to update it to be completely the same software as is currently on the new iMacs? or is it too old of a model? I know that some of the older iPhones don't/can't/shouldn't be updated to the newest software, because of performance issues, what about iMacs? I would use it/them (in case I find another) only for basic browsing, and the calender and Pages and basic iCloud and iTunes things, nothing taxing that I can't easily do on the macbook air. Thanks in advance for your help and input! ** a little more info, it's got 4GB of Ram which I can upgrade, and it has an intel i3 in it.