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Bartender 3

Organize your menu bar apps

Bartender 3 - StatusBarApp compatibility

I have a wifi adapter that has a menu item, this is called StatusBarApp in Bartender and it isn't controllable.
The installer of this menu bar app installs it to run as root, this gives it extra privileges and also prevents Bartender from controlling it.
It does not actually need to run as root so can be changes to run as the current user (same as most apps). You can do this with the below terminal command which stops the app running as root:

chmod -R 0777 /Library/Application Support/WLAN/StatusBarApp.app

If the app is in a different location you will need to change the command accordingly.