Note regarding High Sierra (10.13) or newer Mac OS You may have to temporarily allow installing programs downloaded from anywhere in System Preferences, Security and Privacy. Evoluent Mouse Manager (driver) may optionally be installed to customize the buttons with a variety of functions, such as Copy, Paste, Enter, etc.Insert the battery and slide the On/Off switch on the VerticalMouse to the green position or cycle it off and on to begin pairing.Go to System Preferences, Bluetooth and click Setup New Device or the + sign to add the mouse.Mac/Bluetooth models without a receiver:.