Ok I posted a thread the other day...I upgraded a 2010 mbp to a new rMBP. Apple have confirmed a wifi error on my new MBP and are going to replace (which I'm a bit gutted about as I am a keen photographer and was worried about all these yellow tint stories....and my screen was perfect) So...I have two back ups... one from my 2010 mbp that I know works fine one from my 2014 mbp that has a wifi issue Dont migrate anything but use a fresh set up and just copy over folders I need..(will my application folder just copy over OK?) When I migrated a had a bit of a clear out and uninstalled some old programmes/files/ emails etc.. I would prefer to use the 2014 backup...but given the wifi issue would it be better to migrate from my fully working 2010 mbp backup to be on the safe side?? Which would you do...am i just being paranoid? *Note apple cate didn't confirm if hardware or software fault..they just said fault.