Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I closed all applications and then chose to install the Performance Update that was released this week (October 16, 2009). Upon rebooting I get a blue screen with the gray and black waiting circle. Is it safe to just hold down the power button until the system shuts off and the restart?

share|improve this question
Update I waited for 10 minutes and the system just stayed at the blue screen with the grey and black waiting spinner, so I held the power button down for 5 seconds and restarted the system. Upon restarting (which took much longer than normal), the Bluetooth is not available. I rebooted again and Bluetooth is still not available. – Matthew Rankin Oct 16 '09 at 14:24
If Bluetooth is not available, try doing an SMC reset. It might sound like voodoo, but it worked for me. See – Olly Hodgson Oct 16 '09 at 14:35
Thanks to Jared Harley for fixing all my typos. I'm clearly not an expert typist when forced to submit questions to SuperUser from my iPhone! – Matthew Rankin Oct 16 '09 at 14:58
@Olly: You might want to make that an answer instead of just a comment. – Chealion Oct 16 '09 at 15:00
@Olly: Please make that an answer, as that was the answer to solving the Bluetooth problem. The boot time still seems a little longer than what I'm used to, but I'll review the logs with Console to figure what's up there. Thanks again. – Matthew Rankin Oct 16 '09 at 15:07
up vote 3 down vote accepted

If Bluetooth is not available, try doing an SMC reset. It might sound like voodoo, but it worked for me. See

share|improve this answer

Try booting with v pressed (verbose booting); maybe you'll spot something there. This might be a first step in diagnosing your problem. What's weird is that the performance update had nothing to do with bluetooth, it was hard drive related. You probably corrupted a file when you powered off the machine.

share|improve this answer
I tried booting with v pressed but didn't receive anything. I agree that the update didn't cause the bluetooth problem, except that the update didn't perform correctly, so I bet you're correct that something was corrupted during the process or when I powered off (although I can't believe that the update should take longer than 10 minutes). – Matthew Rankin Oct 16 '09 at 15:09

The performance update was to do with the issue where hard drive read would stall. I don't see how it could have affected the bluetooth.

However, turning off the machine during boot could have resulted in damaging a file related to bluetooth.

I would recommend restoring your Mac to a backup (Time Machine, or otherwise) taken just before you installed the update.

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .