I was trying to boot 4 linux OSes (using rEFInd): Kali, Ubuntu, Mint and Elementary on my 2015 MBP. Both Kali and Ubuntu would not boot at all and Linux Mint and Elementary would boot however some text, graphics and images would not show (tested on a PC and virtual box and it worked).
How would I fix this issue? Do I need drivers or something else? I cannot see the text to connect to the network and the Applications will not show correctly.