Have a brand new(ish, few months old) MBP Retina 2015 model. I have 0 problems with installing software, updating software, etc.. except for Outlook 2016 for Mac. I can't update them from the Auto Update tool, they always fail. I've tried completely blowing out all of the Office 2016 products including all the libraries, etc. and freshly installing. Even after a complete fresh install they fail to update. The updates go through perfectly fine on my 2012 non-retina MBP, but fail on my 2015 MBPR.. any ideas what could be causing this? Both are on the very latest version of El Capitan.