What's SteerMouse?
SteerMouse is a utility that lets you freely customize buttons, wheels and cursor speed. Both USB and Bluetooth mice are supported, no matter whether the mouse is designed for Windows or Mac.

You can assign a function to combinations of a button and modifier keys ( command shift option control ). In addition to it, you can assign a function to combinations of buttons. Your mouse will have unlimited potential.

System Requirements
macOS 10.12 or later

Homepage

https://plentycom.jp/en/steermouse/