The latest release for the WPILib can be found here
Chose the macOS version
Double click on the
WPILib_Mac-2020.3.2.tar to remove the tar extension. There should now be a folder as shown below.
Open the terminal and run these commands
cp -R ~/Downloads/WPILib_Mac-2020.3.2/ ~/wpilib/2020
This will create the appropriate directories for WPILib and move the contents of
WPILib_Mac-2020.3.2 to the
~/wpilib/2020 folder. When done the folder structure should look like this.
The tools need to be update so they can be used. Run the commands below to do so.
An example of using the terminal is shown below.