Hi,
I have a 2010 27" iMac with OSX.6.8 (if I remember well). Yesterday, I made a backup on an external drive with Time Machine, I downloaded Mavericks, proceeded to installation and when it restarted it got stuck on the grey screen.
I've tried every procedure from the Apple support, nothing worked.
Please help. I'm not living close to an Apple store and I'd love to figure this out by myself.
Philippe
imac, Mac OS X (10.6.3)
Hi Philippe,
Has this iMac gone without AC power for extented periods?
If so likely the PRAM Battery is dead.
Couple of things to try...
Hold alt key at bootup, what boot options show up?
Bootup holding CMD+r, or the Option/alt key to boot from the Restore partition & use Disk Utility from there to Repair the Disk, then Repair Permissions.
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/HT1379
In fact, do 3 in a row, takes a bit of time.
Thank you for taking the time to reply.
The answer to your question is no.
As I said before, I've tried every procedure in the apple support.
I've tried again this morning, and I'm still stuck on the grey screen with the spinning wheel...
I'm finding the same thing after setting up Maverick. I can boot up from an alternative disk which is still set to Mountain Lion, I've run disc doctor, but whenever I restart using the mavericks disk I just ger the grey screen and the spinning timer.
I have a backup copy made with Time machine on an external drive. Can I boot up from it?
Hey Phil I have the same problem with the same system. I restarted into disk utility's and proceeded to reinstall the IOS It is working fine now. Hope this helps. Hold command R and power up hold the keys till disk utilities appears then click on reinstall IOS follow the prompts ... Good luck..
Thanks, but how long do I have to hold the keys? Because even after holding them for a looong time, nothing changes, I can't access to disk utility...
Power off your imac hold down on command and R key while holding them down start your system keeping the keys command and R held down the disk utility screen should open when you see it release the keys and select reinstall OS it will have you long in to your apple account follow the prompts from there ( it took about 2-3 Min. for the disk utility to open on my imac ) hope this helps..
I've done that, several times, but it didn't work.
I have, sort of, solved the problem. It seems that Mavericks was clashing with one of my programs, possibly Flip4Mac. As I have an alternate system set up I was able to save all the contents of my main disc, then delete everything. using disc utilities. After Maverick was installed a menu came up asking what I wanted to restore. The first time I chose everything, and finished up with the same grey screen. So I tried a second time and chose not to restore the applications, and finally after spending so much time I have a fully functioning Mavericks. Now all I have to do is very carefully restore the rest of my applications.
Phil
Did you read the before you install notice http://support.apple.com/kb/HT4722. This may help. However I have just had another freeze, and when I checked the 'back up program' I found that it had started a back up at just about the same time Final Cut froze. Could this be causing the problem?
Thank you guys!
I brought my iMac to the local dealer where I had Bought it. After one week they told me the mother board was damaged (by an update??). The repair was half the price of the new iMac. So I bought a new one... When I picked up the old one, I realized they had succeded to start it up, but they were unable to explain how... So I have two Macs and I spent over $2000 for nothing.
Okay, we're in Tahiti, but I wish we had a decent Mac support over here...
My iMac does not start up after Mavericks upgrade
