Hi all
Successful installation of Big Sur 11.3 on cMP5.1 (SSD in SATA port, I didn't try with NVMe), with Barry's micropatcher 0.5.1
But I encountered some issues, during the update from 11.2.3 to 11.3, on the first reboot, remained frozen on the boot screen (gray apple), progress bar at 50%, impossible to get white apple screen and continue the the second part of installation, I forced the shutdown and started again, I tryed 4 times with the same problem each time.
So I decided to format the SSD and perform a clean install, but also encountered some issues.
During the installation, on the third restart, remained frozen on the boot screen (2 times with the progress bar at 50% and once with empty progress bar) I therefore forced the shutdown 3 times. Then on the fourth attempt, the progress bar went quickly to 100% then restarted and still got frozen on the boot screen with empty progress bar, so I forced shutdown and then start once again. At this time everything went correctly and I finally got the Big Sur configuration screen.
View attachment 1764870