Bit of an odd one this which I can't quite figure out. Basically after a few hours use my 2011 iMac running Yosemite 10.10.1 will stop all it's pretty UI interactivity, by this I mean:
Theres some other bits but that's the main issues, if I reboot it goes back to normal. Few hours later the same issue happens again!
- The dock no longer magnifies when I hover over it
- Clicking a link in the browser does not show the clicked state
- Clicking any buttons don't show the click state
- Hovering over a menu in the browser does not expand the menu
- Can't right click on half of the things
Theres some other bits but that's the main issues, if I reboot it goes back to normal. Few hours later the same issue happens again!