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Connect a Bluetooth device with your Mac
Connect your Mac with a Bluetooth keyboard, mouse, trackpad, headset, or other audio device.
Make sure the device is turned on and discoverable (see the device’s documentation for details).
On your Mac, choose Apple menu
> System Preferences, then click Bluetooth.
Select the device in the list, then click Connect.
If asked, click Accept (or enter a series of numbers, then press Enter).
You need to connect your Mac with the device only once. The device remains connected until you remove it. To remove a device, Control-click its name.
You can also connect a Bluetooth device to your Mac by clicking the Bluetooth status icon in the Control Center or menu bar and choosing the device.