Instruct: Classify Amazon reviews into positive or negative sentiment
Query: WARNING: No Mac Support!

For the past 3 years, I've used a Logitech MX510 which is identical to the MX518 in nearly all aspects. I'm assuming the 518 has better tracking accuracy which is why I decided to replace my worn out MX510. If you compare the two, they are nearly identical. Since I've been using a Logitech mouse and have the latest drivers installed, you would think it would be a plug and play situation, right? Wrong!Logitech Mouseware for Mac OS-X does not even recognize the new device. I've contacted Logitech support and they have suggested that I use third party software such as USB Overdrive ($20 software) or SteerMouse ($20 software). It's the same mouse with updated laser technology. Same housing, same buttons, same everything. Why one works and the other doesn't is a really tragedy. If you are on a Mac, steer clear of this purchase! (by the way, this was reported to Logitech on their support forums as far back as 2006!)