I installed the driver and it DRESTROYED MY MAC! I was SO upset that this is the first review I have ever done in my life. I had to FORMAT MY HARD DRIVE TO RECOVER from the bug.I searched online and other people have had similar problems in forums. Logitech said they were sorry but I was on my own. They know this is happening and continue to ship defective drivers?It cost me 4 days to retrieve info and many times the cost of the purchase.Bottom line: If you use MAC, DON'T TAKE CHANCES DO NOT BUY UNLESS THEY GUARANTEE THEY WILL PAY FOR RECOVERY EXPENSES!Of course, I returned the item. Don't want it anywhere near me.