- Joined
- Sep 26, 2010
- Messages
- 120
- Motherboard
- Gigabyte Z490 Vision D
- CPU
- i9-10900
- Graphics
- RX 5700 XT
- Mobile Phone
At least one other person encountered this problem, but I don't recall the solution or workaround. Let's see if we can troubleshoot it here, and if successful, I'll add it to Post 1.
- What is the make/model of your monitor?
- Are you connecting via HDMI or DisplayPort cable?
- Was macOS installed from scratch, or was an existing macOS SSD transplanted into this system?
- What is the make/model of your RX 5700 XT?
- If there's a "Factory Reset" option on the monitor itself (via its on-board menu), have you tried a factory reset?
- What system name are you using? iMac19,1 or iMac20,2?
- If nothing else works, please try SwitchResX from here. There's a trial period, and a license is quite inexpensive. If you need help with SwitchResX, just ask.
Thank you for the reply!
1. LG 27UD69P-W
2. DisplayPort
3. macOS Catalina and Big Sur was installed from scratch (same issue)
4. Sapphire RX 5700 XT Nitro+ Special Edition
5. Yes. Tried it, no luck
6. iMac20,2
P.S. I'm using that monitor for 3 years since Mojave without single issue.
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