On an MBP 2011 (17") as well as an MBP 2010 15", an MBP 2015 13", two iMac’s 2018 21.5" the system boots just fine, but not to Desktop, unless the “compatibility” mode is chosen. No accelerated graphics, even though all of these computers have a discrete nVidia or AMD/ATi GPU.
Futhermore; on none of these the WiFi works. (All BroadCom based)
I’m happy to help track down the problems here, seeing as I’ll be having a lot of downtime due to the global Corona pandemic, but you will have to guide me through it.