Sadly, my Logitech Performance Mouse MX is having major issues. I first encountered this when I got my late 2013 iMac which unlike my mid-2011 has USB 3.0 ports and my backup disc is USB 3.0 and connected to one of them. Apparently it turns out after contacting Logitech in the past that this causes problems with their wireless mice, at least predating USB 3.0 which would include my Performance Mouse MX purchased in 2012. Their solution to this problem was to send me a USB extension cable to plug the wireless USB connector into and thus move it away from the USB 3.0 ports in use by USB 3.0 devices. This seemed to work okay mostly but for some reason many months later I now have the same erratic behavior as before with errant mouse clicks, double clicks, released button presses even though I am still holding the button and more. Naturally, this quickly became something I couldn't live with. So now I am using the Magic Mouse which will do temporarily but doesn't allow for simultaneous left and right button presses to aim and shoot a scoped rifle in a shooter for one thing. I also find it less than ideal just in general although it does work good enough for KOTOR that I am playing now. My biggest question is, are new wireless mice immune to this issue now? Has the interference problem been overcome? I went to Amazon hoping I could buy a new model Performance Mouse MX because I liked the thing so much but they seem to be selling the very same model I bought before. The page even tells me I bought this one from them already. What I liked about the Performance mouse was that I could plug it into USB to recharge its battery while continuing to use it. Of course, I also liked the mouse itself, being somewhat sizable and fitting my hand well. It's just comfortable to use to me. It has a few extra buttons but I never used them. I don't need or want extra gaming buttons really. I just want a responsive mouse that feels good and works decently on a Mac not only for everyday use but for gaming too. The Performance Mouse MX while not cheap, fit that bill very nicely. So, what's the deal now? Am I safe buying a wireless mouse for an iMac with USB 3.0? I would hope so but I don't know. So hopefully you guys can clue me in. If you can recommend something similar to what I had from a well known and respected maker of mice, I'd be very interested, preferably something i can order on Amazon and again, I don't really need a mouse with a ton of buttons on it although a few wouldn't bother me I guess so long as they were not placed such that I could have issues hitting them accidentally. An option to turn them off would be a nice thing if I wanted it. By the way, I checked for bluetooth mice on Amazon and the results were not encouraging. So it appears I need to stick with USB but please correct me if am wrong there. Bluetooth would be great if I could find a decent Bluetooth mouse. Thanks.