You can use the selector button on the bottom of the MX Master wireless mouse to pair it with up to three devices on your computer running Windows 8 or a Mac running OS X 10.10 or later.
NOTE: The MX Master wireless mouse uses Bluetooth Smart technology and is not compatible with Windows 7 computers that do not support Bluetooth Smart.

• Connect to Windows 8
• Connect to Mac OS X 10.10 or later

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Connect to Windows 8

1 — Power switch
2 — Connect button
3 — Device selector button

To connect your mouse to a computer running Windows 8:

1. Turn the mouse on by sliding the power switch on the bottom of the mouse up. 
2. Using the device selector button, select 1, 2, or 3. You can save up to three devices to memory on the mouse.
   NOTE: If the number blinks rapidly when you first select it, it’s ready to connect. If so, go to step 4. Otherwise, continue to step 3.
3. Press and hold the connect button on the mouse until the number you selected starts blinking rapidly.
4. Add the mouse to your computer: 
   • On the Start screen, right-click in an empty space, and then select All apps > Control Panel > Devices and Printers
   
   NOTE: If you can't locate "Devices and Printers", set the Control Panel to "View by: Small icons". You should then be able to see all Control Panel items.
5. In the Devices and Printers window, click Add a device.
6. Choose “MX Master” from the device list and then click Next.

   

   A status screen will appear while the connection is configured.

   

7. When the pairing is complete, you’ll see a confirmation screen. Click Close to exit.

   

NOTE: If the MX Master is already paired but having a problem connecting, remove it from the device list and then follow the instructions above to re-connect it.
 

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Connect to Mac OS X 10.10 or later

1 — Power switch
2 — Connect button
3 — Device selector button

To connect your mouse to a Mac:

1. From the Apple menu, select System Preferences.
2. In System Preferences, click the Bluetooth icon.

   

3. In the Bluetooth pane, make sure that Bluetooth is On.

   

4. Turn the mouse on by sliding the power switch on the bottom of the mouse up.
5. Using the device selector button, select 1, 2, or 3. You can save up to three devices to memory on the mouse.
6. Press the connect button on your mouse to start pairing.
7. In the Bluetooth window on your Mac, click Pair to complete pairing.

   

8. Once the pairing is complete, MX Master will show as “Connected”.