Apps cannot be opened on the very first launch on some macOS machines

[matthme]

Describe the bug
On certain macOS machines, trying to open an app when the launcher has been started for the very first time after installation ends up in an endlessly spinning rainbow wheel.
Restarting the launcher seems to resolve the issue.

To Reproduce
Steps to reproduce the behavior:

1. Install the launcher from scratch
2. Go through the setup steps and then try to open an app

Expected behavior
Opening an app works

Logs
Please attach here the launcher.log file. To find it, go to Holochain Admin window of the Holochain Launcher, select the Settings menu, and select Open Logs. Attach that file to this issue.

[matthme]

Further investigations showed that this error got logged in macOS' console on Launcher startup before the described freeze occured:

Holochain Launcher[22547]: getattrlist failed for /System/Library/Frameworks/OpenGL.framework/Resources//GLRendererFloat.bundle/GLRendererFloat: #2: No such file or directory\

This seems to be caused by failing to load the correct driver on macOS BigSur:
https://bugzilla.mozilla.org/show_bug.cgi?id=1651455#c3
https://developer.apple.com/documentation/macos-release-notes/macos-big-sur-11_0_1-release-notes#Kernel