After updating Mac OS Big Sur, the editor runs at a very low frame rate

Before the Mac OS Big Sur was updated, the frame rate of the game in the editor environment was normal 60 frames, and after the update, it was only more than 20 frames. I changed several projects and tested them. The frame rate of the released mobile phone version was normal, the unity version was 2018.4.10f1, and the MAC system version was Mac OS big sur11.1. Has anyone ever encountered this problem? How to solve it?

 

I haven't updated yet, but I'm curious: are you using the Metal editor, or non-metal?

(I find the Metal editor to be very buggy, to the point of being unusable...)

 

You are right. When I disable metal editor support, FPS will be normal. Thank you very much for your suggestion.

 

Metal API validator?

 

How do you disable metal editor support??

 

I think this was only possible with older versions like 2018.

Just updated to Big Sur. Mac mini i7 2018. Empty project runs at low FPS in editor when running 2020 and 2021. But at normal (like in Catalina) FPS in editor when running 2019.

I think this is the kind of bug that is pretty obvious, no, actually even unmistakable, which makes this situation totally ridiculous, especially since I always wait until Apple forces me through the Xcode system requirements before I upgrade to a newer system so that I can work with a functional product. Therefore I find it really tiresome that I now have to deal with this silly problem with the Unity Editor.

 

I have the same issue after upgrade my Mac to Big Sur. This issue also happened on Windows too, and someone found out how to fix it:

On Mac the steps is the same: Go to Edit -> Project Settings -> Player -> Settings for PC, Mac & Linux Standalone -> Uncheck Auto Graphics APIs for Mac -> Add (plus icon) -> choose OpenGLCore and rearrange it above Metal

After that restart the editor and everything smooth again

 

Same issue as this perhaps (posted a few days ago):
https://forum.unity.com/threads/2020-3-19-onwards-extremely-slow-performance.1177780/

 

Thanks ssyuha, this fixed it for me.

 

I first encountered this problem when I upgraded from Unity 2021.1.21 to 2021.1.22. It was so bad I had to switch back.

ssyuha - thanks, your solution corrected the problem for me too.

But I don't want to shut off Metal forever. Is anyone at Unity aware of this problem? It seems like it's happening to a lot of MacOS users.

I wonder if it's related to this bug fix.

 

Thanks this fixed my issue

 

It worked like a charm on my mac... Thx!

 

Thx!!!!!

 

I have tried this and it doesn't seem to work for me, gameplay in the editor is still very stuttery when both Scene and Game view are visible. As soon as I maximise to just Game view, everything is buttery smooth.

Please do you have any other ideas how to improve this?

I am running 2020.3.25f1 on a M1 Pro.

 

Same issue here, still.
Extremely annoying :S

In the editor the game view

• performs poorly if the Scene editor view is open at the same time (almost half of the FPS count if only the Game view is visible alone)
• performs much, much better if i switch to opengl, (but as i have to test the standalone build too at the same time i do not want to switch always and always back and force between metal and opengl !!!)

Unity 2021.1.28f1.3303 (cannot upgrade yet because of other serious URP bug in higher versions)
macOS 11.6.2 (20G314)
MacBook Pro (Retina, 15-inch, Late 2013)
Graphics Cards
Intel Iris Pro / NVIDIA GeForce GT 750M

 

Thank you for providing this solution. It fixed my performance issue on mac.

 

unfortunately, it could be just a temporary workaround as each time you need a standalone build you should switch between the 2 settings back and force and pay attention not to forget it before a release build :S

 

Just downgraded to Unity 2019.4 and I'm able to fix this issue without switching to OpenGL Core by enable Automatic graphics switching in MacOS Settings. This option is enabled by default but I turned it off in attempt to fix another issue with Unity 2020 xD