Upgraded my GA-Z97X-UD5H rig to GA-Z490 VISION G (no Thunderbolt)- very smooth 
1) Before installation, Firmware upgrade to 8C
2) Followed description on page 1 from CaseySJ's Z490 thread
:

Note: Firmware 8c sets CFG lock to locked by default, change status to unlocked to avoid boot failure
3) OpenCore 0.6.6 set up for this board from the thread: EFI folder

Working:
+ ALC1220-VB audio
+ i225 Ethernet
Not working:
monitor wake up...
Tonymacx86

1) Before installation, Firmware upgrade to 8C
2) Followed description on page 1 from CaseySJ's Z490 thread

Note: Firmware 8c sets CFG lock to locked by default, change status to unlocked to avoid boot failure
3) OpenCore 0.6.6 set up for this board from the thread: EFI folder
Working:
+ ALC1220-VB audio
+ i225 Ethernet
Not working:
monitor wake up...
Tonymacx86

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