Hey guys. I have here what seems to be a simple question but I have no idea and have no way to test it before committing. I have a fat macbook pro mid 2012 and I wanted to run a time machine, put it all in an external hdd, SELL the mbp, buy the new 2016 mbp and then finally transfer everything back to the new machine to continue my work uninterrupted. Is that possible at all? If so, can I keep my mid 2012 machine in El Capitan or do I need to update to sierra in order to perform such action?