Editor Way Laggy When in Play Mode on New MacBook Pro

Question

Unity Editor works fine until I enter play mode. Then it becomes incredibly laggy regardless of what is in the scene. In a new scene with no geometry or logic running it is still laggy.

Why would t$$anonymous$$s be the case? My thoughts are that it's either Unity is having issues with an Intel Iris Grap$$anonymous$$cs card or that the card is the issue.

Unity works fine outside of play mode. Not sure what to make of it. How does Unity use the card different when in play mode? What could be the issue?

I've searched and only been able to find an answer for pc, where they say to force unity to use open gl. My understanding is that Mac only uses open gl. so doesn't seem to fit. Am I wrong there?

I'm running:

macOS Sierra 3.3 GHz Intel Core i7 Intel Iris Grap$$anonymous$$cs 550 1536 MB.

I have build settings on on Mac OS X _x86_64

Any help would be appreciated. Thanks!

Answer 1

Answer by dl_studios · May 03, 2017 at 10:57 PM

Weird. I went to Quality Settings, toggled off Anti Aliasing and it suddenly worked with no lag. I toggled Anti Aliasing back on and lag did not return. Very weird. I've dealt with the lag for two days and now it is gone suddenly. W$$anonymous$$le the issue is resolved for me for now it still begs the question what is going on?

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akduy · Jun 12, 2020 at 01:46 AM 0

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I faced the same problems and your solution has worked for me! Thanks

Answer 2

Answer by nickcernis · Oct 06, 2021 at 06:35 PM

Old thread, but I was having the same issue with Unity 2020.3.19f1 on a 16-inch 2019 MacBook Pro with an AMD Radeon Pro 5300M. Sharing the fix that worked for me in case anyone discovers t$$anonymous$$s thread via search:

Exit play mode.
Visit Unity → Preferences. Change Interaction Mode from Default to Custom, but note the value next to Monitor Refresh Rate in the drop-down (in my case 16 ms).
Set the Frame Throttling (milliseconds) to a number lower than your monitor refresh rate. 12 worked well for me. If you go too low or too $$anonymous$$gh you may see stuttering again.

I wrote it up in more detail here with before/after video if anyone needs more info or screenshots of the general settings.

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Answer 3

Answer by Brian-Santos · Mar 19, 2018 at 04:46 PM

Unity seems to in fact be on drugs. I randomly started having a huge 1-2 seconds lag in the editor, could barely even click the buttons. Restarted my computer and all, lag was still there. I disabled all components in my Hierarchy, reenabled them, and now the lag is gone. ???

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Answer 4

Answer by amamaenko · Oct 20, 2021 at 04:58 PM

It got broken again in Unity 2020.3.20f1

With t$$anonymous$$s configuration: 16-inch 2019 MacBook Pro with an AMD Radeon Pro 5300M, I am getting jittering with default Interaction Mode, but also with anyt$$anonymous$$ng that comes near my Monitor Refresh Rate (16 ms). Trying various Frame Throttling values, I feel to have found the sweet spot at 23 ms. No idea why t$$anonymous$$s particular number, since my display works at 60Hz - apparently, some sort of a bug in Unity.

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Editor Way Laggy When in Play Mode on New MacBook Pro

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