Apple - Why doesn't my wireless mouse connect automatically?
If you've paired it before, clicking the mouse after turning it on should do it.
If you are connecting/pairing for the first time, use a USB mouse/keyboard + trackpad to do the following:-
- Turn on your Magic Mouse
- Go to System Preferences from the Apple Menu
- Click on Mouse
- Your device should be able to detect the Magic Mouse
- Click on Connect
- Once you see a message "Connected", mouse is ready to use.
If you have connected/paired your mouse with your Macbook/computer before,
- Turn on Magic Mouse
- After a 2 sec pause, click and it should work.