In the absence of other advice I have shut down the Air by powering down, a 
procedure I hate to use.   Start up now seems OK.
I would still like to know if anyone has suggestions as to how this sort of 
problem may be overcome without the drastic step of shutting down by powering 
off.

Barry


> On 18 Nov 2014, at 8:15 am, Barry Sexstone <[email protected]> wrote:
> 
> My MacBook air 2012 appears to be hanging after an attempt to up date from 
> 10.10 to 10.10.1.   Update was done via app store and all appeared to go 
> routinely until the restart.   The machine appeared to shutdown normally and 
> the initial restart appeared normal with the advice “restarting” appearing on 
> the screen.   The progress bar went all the way to the right and then nothing 
> further happened.   The “gear wheel” is still running and the “restarting” 
> message is still showing after over an hour.
> 
> Advice as to my next step?
> 
> Thanks 
> 
> Barry
> 
> 
> 
> iMac 10,1
> Intel Core 2 Duo 3.06 GHz 
> 16GB RAM
> 1.0 TB HD
> OS X 10.10
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
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> 
> 
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