The latest versions of Wireless Mouse M545 / M546 use Logitech Options software for Windows and Macintosh computers. You can use Logitech Options to enhance the functionality of your mouse.

To see if your mouse is compatible with Logitech Options, check the first four digits of the serial number (S/N) on the back of the mouse. 

If the first four numbers are “1526” or higher, it means your mouse is compatible with Logitech Options.

If the four digits are lower or if it includes a letter, your mouse is an older model and is not compatible with Logitech Options. You can still use SetPoint for Windows to increase the functionality of your mouse. Unfortunately, there is no software support for Macintosh.