Hey GreenLightLearningTools,
Thanks for the question. To put the Magic Mouse into discovery mode:
If your mouse isn’t paired with a Mac, the light blinks, indicating your mouse is in discovery mode and ready to pair (pairing means your mouse and Mac are wirelessly connected to each other and ready to communicate).
If you need to pair the mouse with a new Mac:
To pair your mouse with a new Mac:
1. Slide the On/off switch on the bottom of your
mouse to turn it on (see page 3).
2. Turn on your Mac and follow the onscreen instructions in Setup Assistant.
3. Once your mouse is paired with your Mac, use Software Update again to make sure you have the latest software installed (see page 2).
For more information, see this resource:
manuals.info.apple.com/MANUALS/1000/MA1209/en_US/Apple_Magic_Mouse_UG.pdf
Thanks,
Matt M.