support for any of their high-end keyboards or webcams. The perfect example of how Logitech once again has alienated Mac owners is clearly evident with this mouse. Look at the drivers disc that is enclosed with the packaging and you'll notice it's windows only. In order to get Mac drivers for this mouse, you need to go to the Logitech website and wade through several pages of support material. To make matters worse, the drivers do nothing to enhance the mouse experience. I have not found any way to control tracking speed (though fortunately the default speed is fast). Additionally, if you want to set up specific commands for this mouse such as "one button search" with Google, you'll find it doesn't work. The option that lets you scroll horizontally doesn't even work. Quite simply, the drivers for Mac don't work here. So, what remains for me is rating this product as an ordinary mouse. Sure, it's a very light and comfortable mouse that fits snugly around the hand, but not much more elaborate than most other cordless mice I have used as of late. There's a "turbo wheel" of sorts that allows super fast scrolling through webpages, but I have yet to figure out how to make it work. You are supposed to configure it through the Logitech Control Center, but the instructions are rather complicated as there are several modes of scrolling and clicking that need to be set up, and the instructions are rather vague as to how to do it correctly. Many people have complained about the wireless range of this mouse. Supposedly, based on many reviews I have read, this is a huge problem. I am happy to report that the USB receiver is hidden behind my Mac Pro about 2.5 feet away from the mouse and I have no issues with signal loss. The mouse is extremely responsive. The Logitech MX Revolution comes with its own charger that is greatly streamlined from those that came with older high-end mice. When you place the mouse in the charging cradle, there are small lights that indicate how much charge is left in the mouse. This is one feature I greatly appreciated. Beneath the scrollwheel there is a small button that I think most people have mistaken for being a scroll speed enhancement. Unfortunately, it's just a simple button that you can push to perform a search function. In Mac, the button brings up SPOTLIGHT search. However, as I have stated previously, attempting to set the button up for GOOGLE search or the like will not work on Mac. The bottom line here is that the Logitech MX Revolution, as with most Logitech products, is probably best suited for Windows users. Mac users have grown to learn that Logitech just isn't fond of OS X and goes out of their way to deny driver support for that OS. Mac users beware! Yes, you are getting a wonderful mouse that is light, comfortable and very chic! However, you are also getting a product that is barely usable above being an ordinary cordless mouse. *** Note: It has been brought to my attention that PERHAPS these defect issues are only relevant to the Mac Pro.