I have a very strange problem, and it started since I got my LG 5K Ultrafine screen and started using an external keyboard and mouse.
I usually notice it in Blender, so it might be related to that.
I use the middle mouse button to rotate the view in Blender, and suddenly it acts as if I'm holding down the mouse button, even if I'm not, and when I move the mouse the view rotates.
Now if I switch to a browser, like Chrome, the middle mouse button doesn't work. I can't close tabs for example, which usually works.
Using the track pad, I can triple finger click, and it works as it should.
I have a couple of mouse controlling apps, to make it work like I'm used to from PC, and it might be causing these issues.
- Smart scroll (to controll scroll speed in different apps)
- USB overdrive (to disable the horrible acceleration)
- Logitech control center (which only works when a Logitech mouse is in)
I just tried switching to a Logitech mouse, and it has the same issues as the other mouse, which is a Corsair (which doesn't have Mac drivers, but it usually just works)
Suddenly it just starts working again, and also a reboot helps, but it's so annoying since it happens like once every 30 minutes or so.
So it's a weird problem, and I'd be happy to know if anyone has had anything similar?
Best Answer
USB Overdrive was the culprit, and I found that it happened when I held the scroll wheel clicked and scrolled at the same time. By disabling/enabling USB Overdrive, it started to work again.
However, when I disable the setting "Wheel button: Middle button", this stopped happening, and the middle mouse button works as it should.