topic Re: Mac OS Big Sur and external GPU (eGPU) issues in Fusion Support Forum

Mac OS Big Sur and external GPU (eGPU) issues

jason5YR9X — Thu, 06 May 2021 10:59:01 GMT

I recently updated to Mac OS Big Sur (11.3). Running on MacBook Pro (13-inch, 2018, 2.3 GHz Quad-Core Intel Core i5).

Fusion works as normal until I connect an external GPU (AMD Radeon RX5700XT inside Razor CoreX).

When I check the "Prefer external GPU" box on the Fusion360 app and launch it. I get a blank window with just some elements appearing (see screenshot).

This was an issue when I last upgraded to Big Sur 11.1 so I reverted back to the previous OS. Now on 11.3 and it's still an issue.

Is this something Autodesk has on their radar? Can we expect a fix soon?

Thanks

Re: Mac OS Big Sur and external GPU (eGPU) issues

mohammed.aliTDPXK — Sun, 09 May 2021 11:49:45 GMT

Hello @jason5YR9X ,

This seems a known issue, can you please try the below workaround and see if this works?

Close Fusion.
Open Terminal, type launchctl setenv QT_QUICK_BACKEND "software" and press enter.
Close Terminal.
Open Fusion.

If you would like to undo, type launchctl unsetenv QT_QUICK_BACKENDBut this looks like a generic opengl issue. Even if Fusion UI can show, I am not sure the graphics canvas can show properly.

Let me know if this helps.

Re: Mac OS Big Sur and external GPU (eGPU) issues

jason5YR9X — Thu, 13 May 2021 11:47:08 GMT

Hi @mohammed.aliTDPXK

Thanks for the support. I followed your instructions and now the UI shows, however as you said, the canvas is blank.

When you say this is a generic OpenGL issue does that mean we have to wait for Apple to debug?

Thanks again.

Re: Mac OS Big Sur and external GPU (eGPU) issues

mohammed.aliTDPXK — Tue, 18 May 2021 14:58:49 GMT

Hello @jason5YR9X ,

This issue has to be looked by our team and I am not sure when you can see a fix for this item.

Will update you once I get something from the team.

Thanks!