- Joined
- Nov 23, 2016
- Messages
- 68
- Motherboard
- ASUS Prime X299-DELUXE-3105
- CPU
- i9-7920X
- Graphics
- RX 570
- Mac
...thank you for the quick reply. Which OS did you have installed? I am currently on Big SurIn my case the system ran fine but was unable to connect USB-C devices on Thunderbolt ports. Downgrade procedure is in the post below, but requires external flash ROM reader/writer: