Are you having trouble connecting your gStrength to your Mac? Here are a few things to check.
From "Finder" go to "Windows" select "Utilities." A window will pop up.
Scroll down/find "System Information" and click on it. A new window will pop up.
Under the "Hardware" tab, click the down arrow and scroll down to "USB."
Click on "USB."
You should then see the "USB 3.1 Bus" if on Mac OSX Catalina on a Mac Book Pro 2019.
Under it will be an entry "Feather M0" which is the board. If you see this you are connected.