4
OS Recommendations for 2014 MacBook Pro
(lemmy.ca)
Mint-LMDE
Perfect for my 2013 air
Agreed. I have a 2011 still kicking with LMDE 6.
I haven't used source-based distros, but I've installed Linux on a couple of older Macs. You will probably need to search for proper drivers for the Webcam and Wifi. Other than, you won't have any mayor problems.