MAC Boot Problem

[x5x3]

I switched on the iMac today (24 inch with Snow Leopard) and got a white screen. I tried again (via bootcamp) and it booted into windows fine (I have it installed dual boot), but I noticed that instead of saying OS X it now says "EFI Boot" and if I select it then I get a grey progress bar which eventually goes away and it just sits there with the apple logo - any ideas what has happened?

[Man-At-Arms]

sounds like a prelude to a Kernel Panic
get your data off quick

before you see this :

[x5x3]

except it does not boot so I do not see any message at all?

[Paul 2000]

If you have got the install disk that came with the Mac put it in the DVD/CD drive and start up holding down the 'c' key. Hopefully the Mac will boot up (slowly) - at the prompt screen select your language and at the next screen from the menu bar select Utilities/DiskUtility. Select your disk from the left side and click on repair disk. Keep doing repair disk until you get a clean pass and then reboot normally. As already suggested it would be a good idea to back-up your data, if you haven't already, ASAP - kernel panics are not good and often the pre-curser to some major failure. A disk repair program called DiskWarrior is a good investment for running regular disk health checks and will often recover an otherwise dead drive.

[x5x3]

Paul 2000 said:

If you have got the install disk that came with the Mac put it in the DVD/CD drive and start up holding down the 'c' key. Hopefully the Mac will boot up (slowly) - at the prompt screen select your language and at the next screen from the menu bar select Utilities/DiskUtility. Select your disk from the left side and click on repair disk. Keep doing repair disk until you get a clean pass and then reboot normally. As already suggested it would be a good idea to back-up your data, if you haven't already, ASAP - kernel panics are not good and often the pre-curser to some major failure. A disk repair program called DiskWarrior is a good investment for running regular disk health checks and will often recover an otherwise dead drive.

thanks - will try that - to be honest there is nothing on there worth backing up - I do have time machine installed but not sure it is up to date, it mostly gets used by the kids for Windows games (yes I know that is terrible really), I have my MBA which is kept up to date with time machine.

[x5x3]

tried this and it comes up with the following errors;

Keys out of order


The volume Macintosh HD could not be repaired
Error: Filesystem verify or repair failed

[lestag]

x5x3 said:

tried this and it comes up with the following errors;

Keys out of order


The volume Macintosh HD could not be repaired
Error: Filesystem verify or repair failed

quick google gave this
http://discussions.apple.com/thread.jspa?threadID=...
from this google search
http://www.google.com/search?hl=en&rls=com.mic...

[x5x3]

lestag said:

x5x3 said:

tried this and it comes up with the following errors;

Keys out of order


The volume Macintosh HD could not be repaired
Error: Filesystem verify or repair failed

quick google gave this
http://discussions.apple.com/thread.jspa?threadID=...
from this google search
http://www.google.com/search?hl=en&rls=com.mic...

thanks - tried those with no luck.

I tried a re-install and that failed also (no detailed message) so spoke to Applecare - they said the install failed as it could not co-ordinate with the bootcamp partition. Their advice was to erase the windows partition and start from scratch - not exactly the easiest option.

So I'm now even more confused about how this happened and how to fix it?