I updated to macOS Big Sur 11.1 and now cannot connect dual displays or my displays are operating incorrectly.

Last Update: December 17th, 2020
Article ID: 776030

Based on customer reports and information online found after this update, it appears that there is a regression in macOS Big Sur 11.1 that is causing video output issues through Thunderbolt 3 devices like our dock such as only a single display works versus two working prior with macOS Big Sur 11.0.1, or video resolutions and/or refresh rates are incorrect (example: only 4K @ 30Hz possible vs expected 4K @ 60Hz).

We encourage you to report these issue to Apple using their feedback form located here: https://www.apple.com/feedback/macos.html

Unfortunately, to resolve this issue you'll need to restore to a previous backup of your system if available for macOS Big Sur 11.0.1 or wait until the next update from Apple.