Use a Bluetooth headset with your Mac
Use a Bluetooth enabled headset to hear and input audio. After you connect your Mac with the headset and select it as your sound input device, it acts as your computer’s microphone and speakers.
Make your headset discoverable to connect it with your Mac (see the documentation that came with your headset).
On your Mac, click the Bluetooth status icon
in the menu bar, then choose the headset you want to use.If the Bluetooth status icon isn’t shown in the menu bar, choose Apple menu
in the sidebar. (You may need to scroll down.) Click the pop-up menu next to Bluetooth, then choose Show in Menu Bar.
The headset is automatically used as the sound input and output device for your computer. You can also select it as the input and output device in Sound settings.