Q: Mac Book fails to boot properly after EFI Firmware 27 update
hi
I have a strange boot issue having (tried) to install EFI 2.7 update.
When I restart the laptop, it 'chimes', displays a grey screen ... then chimes, displays a grey screen , ... for ever
I hit the bower (off) button for 5 secs or thereabouts, and restart ... same thing
I do this 4 times and finally it reboots.
But the EFI update still appears as needing to be installed (software update tells me it is not installed). Update history shows however that it IS installed.
I can go through this process any number of times ... I now have Software Update history showing quite a few installs opf the EFI 2.7 update.
If I just do a restart WITHOUT installing, I also go through the same fail to restart / fail to start / ... / eventually restart sequence.
So it seems now that the laptop will only start after 4 failed restarts and finally it starts ...
After starting it all appears to be perfectly fine.
Nothing strange in the console logs that I can see. The failed reboots don't seem to register in the console logs - I suspect that the failure to restart is pretty early on in the boot sequence, well before it tries to load any semblance of the OSX kernel. It is almost as if it is trying to boot from someplace other than the disk ... until eventually it gives up and tries the disk. (I have tried booting with and without network cable - no difference) I don't know enough about mac bootup sequences to know if there is some config/setting that is screwed up causing this odd behaviour. I sirt of feel it must be setup/software related, but could be wrong.
Odd.
Any ideas?
- chris
MacBook (13-inch Mid 2010), Mac OS X (10.7.3)
Posted on Apr 16, 2012 7:40 AM