Mouse connection

You mean you turned off BlueTooth completely? If yes, plug in your keyboard to your computer using your Lighting/USB cable and use it to access System Preferences > BlueTooth (again using the tab key.) Please note that you have to press the spacebar once you have selected an item in System Preferences, not the enter key.

6x6 wrote:

You mean you turned off BlueTooth completely? If yes, plug in your keyboard to your computer using your Lighting/USB cable and use it to access System Preferences > BlueTooth (again using the tab key.) Please note that you have to press the spacebar once you have selected an item in System Preferences, not the enter key.

And, to open System Preferences, use SpotLight (command + spacebar) and type System Preferences

Try this:

1. Turn off the mouse (the switch is on the back of the mouse) and turn back it on again.
2. If this doesn't work, you can use your keyboard (using the tab key) to navigate to the mouse settings in System Preferences.