Using OS X 10.9.5 I got this message after logging out and back in with different UID. Screen is frozen except I can move the mouse courser around just cannot select anything. Display sleep mode does work. How long does this take? Is there a key combination to stop optimization or reboot?
For more context please see link: What is happening when my Mac is being optimized after an OS X update?
Again, the screen is frozen including clock. Can move mouse and trackpad cursor but cannot select anything. Keyboard works only to wake machine.
Ok, so I tried the hard reboot option and that seems to have worked thus far. Then tried two soft restarts and no problems either. Been using Mavericks over a year now and never had a problem, so I''m gonna run my antivirus software and backup before deciding on what to do with spotlight or the problematic user profile.
Funny, I've waited for Yosemite and iOS 8 to mature and was just preparing my machines for the upgrades.
Best Answer
What you describe is far worse than the normal optimization phase.
If your Mac is so sluggish that the cursor movement and launching of apps is unworkable (delays more than 60 seconds per action) and persists past a reboot, you'll need to get the hardware checked as the storage system is likely failing due to software or hardware failure.
To troubleshoot this:
If this OS is slow, troubleshoot the hardware further.
If this OS is fast:
Good luck - troubleshooting hardware/software isn't a hard concept, but being organized, limiting change, and testing after each step is what makes it sometimes tedious and worth outsourcing.