Connect a Bluetooth device with your Mac
Use Bluetooth® to connect your Mac to a keyboard, mouse, trackpad, headphones, or speakers. You can also use AirPods with your Mac.
To stream audio and video from your Mac to a TV, speakers, or HomePod, you can use AirPlay.
Pair an Apple wireless keyboard, mouse, or trackpad with Mac
To use your Apple keyboard, mouse, or trackpad wirelessly with Bluetooth, you first need to connect the device with your Mac.
When you connect a Magic Keyboard, Magic Mouse, or Magic Trackpad to your Mac, the device automatically pairs with your Mac by using Bluetooth.
Connect the Lightning end of a USB-C to Lightning Cable or a Lightning to USB Cable to your keyboard, mouse, or trackpad, and then connect the other end to the USB-C or USB port on your Mac.
Note: Depending on your Mac, you may need an adapter, which is available from an Apple Store or on apple.com.
Turn the device on and make sure the power switch is green.
You receive a notification when you can disconnect the cable and use your device wirelessly.
Note: You must disconnect your Magic Mouse to use it with your Mac. You can use your Magic Keyboard or Magic Trackpad while it’s connected to your Mac.
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 
in Control Center and selecting the device.
Select a Bluetooth audio device as your computer’s input or output device
On your Mac, choose Apple menu
in the sidebar. (You may need to scroll down.)If your device is meant for sound output (for example, headphones), click Output. If your device is meant for sound input (for example, a headset), click Input.
Select the device you want to use in the list of devices.
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.