macOS Snow Leopard – How to Restart Hot Corners

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On Snow Leopard (latest version, but it's been happening for a while), I have the top right corner set to show Spaces, and the bottom right to show the Desktop. Occasionally, often enough to be annoying, and without any reason I can discern, these hot corners stop working. I have tried:

  • changing the action of the hot corners, mouse in (nothing happens), then change back
  • turning off Spaces and turning it back on
  • toggling the Spaces icon in the menu bar (worth a shot, right?)
  • killall Finder
  • killall Dock
  • killall SystemUIServer

None of these work. If I close the MacBook to suspend it, then bring it back up, that fixes the problem, but is less than ideal if I have, e.g. a big download going.

Is there a way to quickly (i.e. not log out/log in, not restart) fix the hot corners? Is there some special program I don't recognize in the System Monitor that will restart the hot corners if killed? Is there something that suspend recycles that I can recycle without suspending?

Best Answer

Have you tried restarting SystemUIServer? (killall SystemUIServer) When something like his is happening and restarting the Dock doesn't help, SystemUIServer is the next one to try.