Just updated my primary Designare Z390 from Big Sur 11.6.1 to Monterey 12.0.1. No problems experienced. Namely:
- OpenCore 0.7.4.
- Boot time is normal with ADATA SX8200 Pro NVMe SSD.
- Fenvi FV-T919 WiFi and Bluetooth working normally without using BlueToolFixup.kext
- As expected, Intel i211 Ethernet port does not connect because Monterey impairs the SmallTreeIntel82576 kext.
- Intel i219 Ethernet port driven by IntelMausi.kext is okay.
All of my previous Monterey installations were on secondary Hackintosh systems, and all were fresh installs. This is my first in-place upgrade.
Note: Samsung 970 Evo and Evo Plus NVMe SSDs -- and possibly Samsung 980 NVMe SSDs -- may lead to significantly increased boot times due to trim-related issues. If macOS is installed on one of these drives, it may be best to
wait a little while to see whether Acidanthera (developers of OpenCore) find a solution.