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Why is my BenQ monitor locked at 4K 30Hz or not showing 4K 60Hz when connected to a Mac M1?

03-10-2021

For SW271C, SW321C, SW271, PD2720U, PD3220U model:

Apple M1 devices with Thunderbolt 3 connections to monitors may exhibit a resolution and refresh rate lock to 4K 30Hz. Make sure you have the latest MacOS version with all the newest updates to resolve this issue, which is caused by an out of date operating system version. If there's any further question concerning this issue, please contact BenQ Support.

Applicable Models

PD3220U 32 inch 4K Thunderbolt 3 DesignVue Designer Monitor, PD2720U 27 inch 4K Thunderbolt 3 DesignVue Designer Monitor, SW271C 27 inch 4K Adobe RGB PhotoVue Photographer Monitor, SW321C 32 inch 4K Adobe RGB PhotoVue Photographer Monitor, SW271 27 inch 4K Adobe RGB PhotoVue Photographer Monitor

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