Hi All, Due to personal circumstances I can't afford to pay apple tax for at least another year, and thus need to keep my trusty mid 2010 17" mbp going for a little longer. My question is, is it worth upgrading to sierra on this machine or is it a world of hurt? And, if so, would a clean install be better? I use Citrix Receiver to log into a windows VM for work, which I have to say suddenly didn't work with El Capitan versions post OS X 10.11.6 (15G1108) - I had to roll back an installation with Time machine and do a full recovery to make it work, and only then using Firefox as it wouldn't work with Safari. Many thanks in advance.