Fix Bluetooth peripheral issues
If your Bluetooth peripheral won’t connect to your Mac, turn it off and turn it on again. If that fails, click on the Bluetooth icon in your Mac’s menu bar, then click the peripheral name in question to see if you can connect it this way. If this doesn’t work, in the same menu, select Bluetooth Settings at the bottom. This opens System Settings, with Bluetooth already selected. Click on the “i” icon next to the device in question, and then click Forget This Device.