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WilliamG

macrumors G4
Original poster
Mar 29, 2008
10,056
3,978
Seattle
I rebooted this morning (was rebooting into Boot Camp Windows 7), and was greeted with this. I had a minor panic attack. The loading bar went across the screen, and then the system booted into Safe Mode OS X 10.8.3.

I rebooted, no issue. Then I rebooted into Windows 7 - no issue. Then back into OS X. No issue..

Weird... This usually only happens on a firmware update etc, but there wasn't one.

*cries*

(2012 iMac, 27", fyi).
 

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That also happens when the system is rebuilding boot caches or is starting up in Safe Boot. Nothing to worry about. During firmware updates, there is only a loading bar on the screen, no Apple or gear.
 
That also happens when the system is rebuilding boot caches or is starting up in Safe Boot. Nothing to worry about. During firmware updates, there is only a loading bar on the screen, no Apple or gear.

I've never seen it happen, so I'm not sure why it did... Why would it need to boot in Safe Boot?
 
It was likely rebuilding the caches. It'll only boot into Safe Boot if you tell it to or it is setup to.
 
It may well be "normal," but I've never seen it happen in over seven years of Mac ownership. :p

Just because you've never seen it, doesn't mean it hasn't happened. Have you sat down at thoroughly watched every single startup of your Macs over the years? No, you've probably missed the few you've had over the years. I get them often when restarting after messing with extensions or updating the system.
 
Just because you've never seen it, doesn't mean it hasn't happened. Have you sat down at thoroughly watched every single startup of your Macs over the years? No, you've probably missed the few you've had over the years. I get them often when restarting after messing with extensions or updating the system.

It's definitely never happened, because I'd notice it saying Safe Boot at the top of the screen, right?
 
It's definitely never happened, because I'd notice it saying Safe Boot at the top of the screen, right?

Let me explain this one last time. It can happen on two different occasions. One if you do a Safe Boot. Two if it needs to rebuild the boot caches. It will never do both, always one or the other. It will sometimes automatically rebuild the boot caches and continue to boot up normally.
 
Let me explain this one last time. It can happen on two different occasions. One if you do a Safe Boot. Two if it needs to rebuild the boot caches. It will never do both, always one or the other. It will sometimes automatically rebuild the boot caches and continue to boot up normally.

I fully understand what you're saying. What I'm saying is that it booted Safe Boot. It said so at the top right of my display. So somehow it did a Safe Boot, but not by my own choosing.
 
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