OC Big Sur black screen / nvme issues

My Open Core Big Sur installation goes black for a few seconds to a minute after at the login screen, then okay. So does my Clover Catalina on a separate drive on same machine.

I did actually get a boot up when it didn't do that - after changing the AAPL,ig-platform-id from 07009B3E to 00009B3E, but now it's come back.

Also, I did the Big Sur installation direct to an fresh NVME SSD — wd sn550. On western Digitals website, they quote my 250gb model as up to 2400 read... but I'm getting...

Read more

Author: NewtMostly