To remove paired devices on a Mac computer, follow these steps:
Removing paired devices on a Mac®
With your Mac turned on, click the Apple® icon (menu) in the upper left corner of the screen
In the Apple menu, choose "System Preferences..."
Under the Internet & wireless section, click on the Bluetooth® icon
Choose a device from the left-hand column and click the "-" button to remove it from the list
Click on the "Remove" button in the pop-up screen to finalize the removal of the chosen device