shutdown issues

Hi All, I managed to install Mac OS Catalina 10.15.7 using Opencore, so far everything works great but Shutdown/Reboot and Sleep. The thing is, some times the machine shuts down nicely, but some times it just goes blank and the computer is still on with spinning fans, and some times power...

I've been running through the various forums trying to rectify my issue of my system rebooting instead of shutting down and I'm still coming up short! I recently got a new BIOS for my motherboard and am concerned there's a setting I'm missing in there. I've turned off wake on land and turned on...

Hi..Everything is GREAT except for...shutdown problem!!!...shut's down and goes off as expected, then 3 seconds later reboots!!!...my config.plist attached System Version: macOS 10.13.3 (17D47) Kernel Version: Darwin 17.4.0 Boot Volume: SSD Boot Mode: Normal Computer Name: Richard’s iMac User...

I installed Sierra semi-successfully - no RX 480 support. I can boot and use system, but when I shutdown, PC won't start at all. I need to rest CMOS, restore settings and only then I can boot again. Asus Z170M Plus, Skylake 6700K, RX 480 Is there something that can be done to prevent CMOS...