Search Issue Tracker

Fixed in 2022.2.X

Duplicate in 2020.3.X



Found in

Issue ID




[Apple silicon][M1] Game view FPS is very low when the view is moved to an external display



Using an external display on an Apple silicon MacBook Pro laptop causes playmode FPS to drop significantly.

1) Connect an external display to an Apple silicon-based MacBook Pro
2) Create an empty project. Make sure the scene view is not visible but the game view is. There's another, separate perf issue when showing both at the same time.
3) Enable the "Stats" button in the game view.
4) Enter play mode.
5) Move the game view between the built-in display and the external display. Leave it for a few seconds each time to let FPS stabilize. Note the values.

Result: Performance on the external display is very poor compared to the internal display
Expected: Much better performance on external displays

Comments (21)

  1. BuildSucceeded

    Jan 06, 2022 11:51

    I have almost exactly the same issue, using Dell external display via usb-c.
    Stats showing 90fps, when game view moved to external display, but for my eyes - I see it's lagging a lot, image is jerky and looks like 30fps, not more for 100%.
    On Macbook window it's perfect like 120Hz.

    Unity 2019.4.x LTS any version.
    Mac 14.2 M1 Pro, lowest default config.

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.