Connect a Bluetooth device with your Mac
Connect your Mac with a Bluetooth® keyboard, mouse, trackpad, headset, or other audio device.
Connect a Bluetooth device
Make sure the device is turned on and discoverable (see the device’s documentation for details).
On your Mac, choose Apple menu
in the sidebar. (You may need to scroll down.)Hold the pointer over the device in the list, then click Connect.
If asked, click Accept (or enter a series of numbers, then press Enter).
You can also connect a Bluetooth device to your Mac by clicking the Bluetooth status icon 
in the menu bar and choosing the device. If the icon isn’t shown in the menu bar, you can add it using Control Center settings.
Disconnect a Bluetooth device
On your Mac, choose Apple menu
Hold the pointer over the device in the list, then click Disconnect.
If you don’t want a device to reconnect automatically, Control-click its name, then click Forget. You have to connect it again if you want to use it later.