Using Bluetooth® technology, your Mac mini can wirelessly connect with devices such as the Magic Keyboard, Magic Mouse, Magic Trackpad, AirPods, peripheral devices, wearable sport accessories, and more.
Before you connect a Bluetooth device with your Mac for the first time, you need to pair them. When a Bluetooth device is paired with your Mac, you can connect or disconnect it using the Bluetooth in the menu bar, click the Bluetooth icon Connect a display to Mac mini for details).
Learn more. See Use Bluetooth devices with Mac in the macOS User Guide.