I am having serious, disabling issues with MEP 22 and 21 that I guess might be related to graphics cards/drivers in a 2016 MBP with a Radeon Pro 455, and a 2017 MBP with a Radeon Pro 560, both on OS 10.12.6.
I read there may be issues with Radeon Pro drivers shipped by Apple, but can't find drivers for these cards on AMD's site.
Anybody has had any such problem or, the other way around, no problem with routing MEP 22/21 in these hardware configurations?
