Unity gets stuck when opening any project on latest MacBook Pro M1 (OS X Big Sur 11.1)

[manurocker95]

I’m trying to use Unity on my new MacBook Pro 2020 (the one with the new Apple M1) but every time I try to open any project (excepting a new fresh project) Unity gets stuck in “No response” and I need to force quit it completely.

Yesterday I left it to check if it ended opening but after 5 hours trying to open the editor , it remained loading. I tested 2019.4.18f1, 2020.1.17f1 and 2020.2.1f1 and all of them have the same issue.

I tested to turn wifi off (stated here: Unity cannot open any project ) and it worked… once. Now it gets stuck again.

I tested using other users and reinstalling Unity. No difference.

Does anyone have any clue?

[Kurt-Dekker]

Assuming your project is properly backed up and/or source controlled, close Unity and try deleting the folder called ScriptAssemblies inside of the project’s Library folder. When Unity reopens it should recompile all. If that doesn’t work, nuke the project’s entire Library folder and reopen.

WARNING: I AM NOT TALKING ABOUT YOUR GLOBAL OR USER LIBRARY FOLDER! USE CAUTION!

[Joe-Censored]

Here’s the thread with Apple Silicon pending and fixed issues, as well as workarounds.

Unity on Apple silicon and Big Sur: Known issues and workarounds

This page contains known issues and workarounds related to running Unity and games made in Unity on Apple silicon hardware and/or macOS Big Sur operating system. Note that native Apple silicon support for the player was added in Unity 2020.2.0a21. We plan to release an alpha version of the editor that runs on Apple silicon hardware natively in Q2 2021. Unity player issues Fixed issues Unity editor issues Known issue: macOS Big Sur beta 10 and later hangs on Apple silicon hardware when using…

HDRP projects appear to require you to manually apply a fix. If your project is trying to open in OpenGL mode, there are comments which say that isn’t supported, you’ll have to force metal. Lots more interesting information.

[manurocker95]

@Kurt-Dekker

Assuming your project is properly backed up and/or source controlled, close Unity and try deleting the folder called ScriptAssemblies inside of the project’s Library folder. When Unity reopens it should recompile all. If that doesn’t work, nuke the project’s entire Library folder and reopen.

WARNING: I AM NOT TALKING ABOUT YOUR GLOBAL OR USER LIBRARY FOLDER! USE CAUTION!

Deleting Library folder completely doesn’t work either

[manurocker95]

@Joe-Censored

Here’s the thread with Apple Silicon pending and fixed issues, as well as workarounds.

https://discussions.unity.com/t/799639

HDRP projects appear to require you to manually apply a fix. If your project is trying to open in OpenGL mode, there are comments which say that isn’t supported, you’ll have to force metal. Lots more interesting information.

Hmm, maybe but I thought it changed automatically to Metal (as it’s the only one supported in the new Macbook)

[Kurt-Dekker]

@manurocker95

but I thought it changed automatically to Metal

Make a new project in a new folder. See if it opens and works, then compare the ProjectSettings/ProjectSettings.asset file (those files are text) with your project.

From that comparison it should be possible to get some new clues to try out. Be sure to use source control so you can revert any experimentation.

If a new project also doesn’t load then that’s a Unity bug. Otherwise there’s something (perhaps related to metal?) that you can fix.

[maxuntoldgarden]

Thanks @Kurt-Dekker for your advice.

The only thing that worked for me was deleting and re-downloading the project from Plastic into a folder with a different name.

• Deleting the Library folder didn’t work.
• Reinstalling Unity 2021.2 didn’t work.
• Deleting the project and redownloading from Plastic under the same folder path didn’t work either.

[manurocker95]

@maxuntoldgarden

Thanks @Kurt-Dekker for your advice.

The only thing that worked for me was deleting and re-downloading the project from Plastic into a folder with a different name.

• Deleting the Library folder didn’t work.
• Reinstalling Unity 2021.2 didn’t work.
• Deleting the project and redownloading from Plastic under the same folder path didn’t work either.

Note: 2021.2 Silicon version works. With the new hub 3.0.0 you can choose between both versions.