Need a new mouse for your Mac? Get the Bumper Mouse by Macally. These mice have an ergonomic design to provide exceptional comfort throughout long computing sessions. The precise scroll-wheel is very smooth to use and is positioned perfectly to provide easy and comfortable access. These mice are built for Mac OS but will work on Windows based computers too. USB Wired Optical Mouse. 3 Button USB mouse with 1000dpi precision optical sensor - White Color. Precise scroll wheel, perfectly positioned to roll smoothly under your finger. Ergonomically designed body sculpted to provide exceptional comfort.