Hi, I'm trying to connect a Ryzen PC to my iMac 27" 2011 with a flashed K1100M running High Sierra, ( OpenCore 0.6.4 27" Nvidia config.plist ) but Target Display Mode doesn't work for some reason. I've tried it with a 2018 15" MacBook Pro using a 2m Thunderbolt 2 cable and a Thunderbolt 2 female...