Connect wireless accessories
Using Bluetooth® technology, your Mac Pro can wirelessly connect (that is, pair) with devices such as the Magic Mouse, Magic Keyboard, Magic Trackpad, AirPods, peripheral devices, wearable sport accessories, and others.
Some included accessories may already be paired with your Mac Pro. For more information about accessories, see What’s included.
Connect a Bluetooth device. Turn on the device so that it’s discoverable, then open System Preferences and click Bluetooth. Select the device in the list, then click Connect. The device remains connected until you remove it. Control-click a device name to remove it.
Turn Bluetooth on or off. Click the Control Center icon 
in the menu bar, click the Bluetooth icon 
, then click the control to turn Bluetooth on or off. Your Mac Pro comes with Bluetooth turned on.
Tip: You can add the Bluetooth icon to the menu bar. Click the Bluetooth icon in Control Center, click Bluetooth Preferences, then select “Show Bluetooth in menu bar.”
Note: Your Magic Keyboard with Numeric Keypad and the optional Magic Trackpad behave like a wired keyboard and pointing device when connected using the included USB-C to Lightning Cable. Bluetooth isn’t used, and all communication is over the cable.
Learn more. See Use Bluetooth devices with Mac in the macOS User Guide.