I'm having a rather annoying issue with my MacBook Pro 16" 2019 device since upgrading to macOS Big Sur. Every time I plug my device to my 4K monitor into the device (via USB-C to USB-C, or USB-C to DisplayPort), macOS will show a maximum resolution of 1600x900 but my monitor's recommended resolution is 3840 x 2160.
I currently have a workaround to resolve the issue which is the following:
- I switch from 1080p resolution to 1600x900
- Un-plug the cable, and plug it back in again
- Then switch to 3840x2160
This process can be tedious and take a while to complete (between switching resolutions). Is there any solutions which people are aware of?
These are the details of the device and monitor
- macOS Version: 11.2.3
- Model: MacBook Pro (16-inch, 2019)
- Processor: 2.3 GHz 8-Core Intel Core i9
- Graphics: AMD Radeon Pro 5500M 4GB
- Monitor: BenQ EW327OU
These are the things which I've done to date
- I can't pin the issue on the monitor, as I've been using a MacBook Pro (2017) with the monitor for a week or so without a single problem.
- Used ColorSync to repair any issues with the monitor profiles
- Used various other cables such as HDMI, USB-C to USB-C and USB-C to DisplayPort.
- Reset NVRAM and SMC
- Re-installed macOS
- I can't reproduce the error in Windows via Bootcamp, so I'm confident it's OS related.