I just got rid of my Mighty Mouse and bought Apple’s new Magic Mouse. I like it, but I didn’t realize that it only has two buttons. The old Mighty Mouse had four buttons that I could configure to trigger Dashboard and Exposé and Spaces.

Your question sums up our main disappointment with the Magic Mouse. Although the new mouse features a multitouch surface, Apple didn’t include any way to customize this surface for features that were standard on the Mighty Mouse for years. This leaves you with barely more than a normal two-button scrolling mouse.

MagicPrefs answers all of our wishes and prayers for the Magic Mouse.

Thankfully, some helpful shareware called MagicPrefs (donations requested, vladalexa.com/apps/osx/magicprefs/) gives you the full ability to customize your Magic Mouse in more than 25 ways. The utility, which installs in your menubar and System Preferences, lets you define what happens when you use different finger combinations to click, tap, swipe, drag, and pinch. You can trigger Exposé, Dashboard, Spaces, launch applications, run AppleScripts, whatever. MagicPrefs even lets you increase the Magic Mouse’s tracking speed, which many users find too slow.