Big Sur fix

Carefully follow the steps below to get MotorLab to run without crashing on MacOS 11 (10.16) "Big Sur"

1. Ensure you have the latest version of MotorLab (current is 2021.0.4). See

2. If needed install MotorLab as described HERE.
3. If you receive a prompt that says "An older item named MotorLab2021 already exists," choose "Replace"

4. Open the "Terminal" app by searching in the Launchpad, or open the Applications/Utilities folder in finder.


5. Copy the following lines into the terminal window one at a time, and press return after each one:

defaults write "Motorlab 2021.0.4 MacOS" NSGraphicsContextAllowOverRestore -bool YES

defaults write "Motorlab 2021.0.4 MacOS" NSViewAllowsRootLayerBacking -bool NO


6. Launch the MotorLab app from launchpad - it should now work normally. If you receive a warning prompt - see the following steps

7. If you receive a prompt that MotorLab cannot be opened because it is from an unidentified developer, you may need to modify your security settings. Click "Cancel" and see the next step. Otherwise proceed to step 9.

8. In System Preferences, click Security & Privacy
9. Under the General tab, click on "Open Anyway" you may need to click the lock and enter your administrator password to make changes.
10. Another warning will appear, this time, choose "Open"