DERPLAU Horrible, horrible, horrible! (on an Intel Mac)
I've had Logitech mice for years, and though there were some driver difficulties a few years ago I thought they'd been straightened out... until I got a new (Intel) Mac. I thought I was going to have to return the Mac itself as a lemon due to the kernel panics, interface glitches, and random hangs I was experiencing. But apparently they were all due to this toxic software on my system! Fortunately there's third-party software available that lets me use my mouse but ditch this pile.
(Version 2.2.2)