Set up Bluetooth
On your Mac
After confirming that Bluetooth is on, go to System Preferences > Bluetooth and choose “Ultrathin Touch Mouse” from the device list.
Click “Pair”.
Note: if you have an earlier version of Mac OS (10.8 or before), click first on the 
button to add a device.
When pairing is complete,
the status light on the mouse lights steadily blue for 30 seconds.
Software required 
Install Logitech software for smoother performance, customizable settings and optimal gestures.
Download the software from: www.logitech.com/support/t631
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