I have used USB Overdrive for many years. If you love a great mouse, USBO used to be the must-have application. It always does more than the mouse company's software for Macs, especially Logitech's (which is just horrid and buggy beyond belief).

HOWEVER, the current version of USB Overdrive (10.4.8) just doesn't work with many of the more modern mice out there, such as the MX518.

lI think Logitech mice are the best out there, especially if you are a fan of shortcuts. From a click on the mouse, you can use all of Exposé's features, switch back and forth on any browser and open a folder.

But, Logitech's last great corded mouse that supposedly worked with Macs was the great MX510. That's no longer available. They've upgraded it to the MX518, but their site says "only works with PC."

I've used the mouse software USB Overdrive for years. Beats the pants off of Logitech's software by a mile. However, the developer hasn't upgraded it for a long time, and try as I did, I couldn't get it to recognize all 7 of Logitech's buttons. I wrote Alessandro, but never did not hear back from him regarding a fix for the 518. His site does promise a new upgrade, but that's been over a year ago.

I finally completely uninstalled USB Overdrive and installed the newer SteerMouse. Works *perfectly* with the new MX518.

If you love a good mouse, but were stymied by how many of them seemed to be PC only, my guess is that any mouse will now work with SteerMouse.

USB Overdrive may eventually come out with a workable version, and make it a worthwhile mouse application. But given the length of time between upgrades, and the lack of response when emailed, I get the feeling the developer has moved on to other projects, so my suggestion would be to go with SteerMouse.