I posted this in the other thread about 2015 MBP's, but I think it might be worth it's own thread... They killed official support for eGPUs for TB2 Macs with Mojave. They were, of course, hoping people wouldn't extend the life of their older laptops and would just buy new laptops. But turns out, with a tiny terminal script, it works amazingly. I have a Vega 56 in an Asus XG Station Pro. My Unigine Valley score comparison... M370X (2015 internal dgpu): 12.4fps VEGA 56 (egpu): 75.5fps I was scared initially, but setup took less than 5 minutes. Buy the TB2>TB3 cable ($50, boo). Then follow these simple instructions... https://egpu.io/forums/mac-setup/script-enable-egpu-on-tb1-2-macs-on-macos-10-13-4/ It's just... disable SIP (you are disabling a security feature, FYI), restart, run PurgeWrangler, restart, done. Works perfectly. Can hot plug/unplug without restarting or anything. MBP 2015 and an eGPU are AWESOME.