Currently Being ModeratedOct 23, 2013 3:49 PM (in response to David gideon)
Your first priority is to make a copy of your data on an external drive.
Try a Safe Mode boot.
• Press the power button and as you hear the bong, then hold down the Shift key.
This boot (and shutdown) will take longer than usual. That is normal.
If that works then drag your user folder (System_Disk_Name/Users/Username) to external hard drive that is formatted Mac OS Extended (journaled). If you do not have an external drive then buy one and use Disk Utility to format it Mac OS Extended (journaled) before you use it.
Once your machine is healthy again (and if you have not lost any data) then you can repurpose that external drive as your Time Machine backup.
As for fixing the problem, someone else will need respond.
Have you tried resintalling Mac OS X? Doing so does not damage your data. Try to copy your data to an external drive before reinstalling.
Currently Being ModeratedOct 23, 2013 5:52 PM (in response to hands4)
If the Safe Mode boot won't work, you can still copy your whole drive using Disk Utility.
Press the power button and as you hear the bong,
then hold down the Command and R keys.
• If it won't boot that way then try a network boot
(power then command-option-R keys).
If that won't work then you need professional help.
Get thee to an Apple Store or Apple Authorized Service Provider.
Once booted, click on Disk Utility.
To format (and erase) the destination recovery disk:
Plug in the drive you are about to erase.
Select the volume that is NOT your system disk.
Click on Partition.
Pull down under Partition Layout to 1 Partition.
Click on Options…
Select GUID Partition Table.
Name: Emergency Recovery
Format: Select Mac OS Extended (journaled)
Drag and drop the named system disk to Source:
Drag an drop Emergency Recovery to Destination:
(Do not reverse these directions.)
Click Restore (the lower Restore button).
If the procedures above do not work:
Genius reservation http://www.apple.com/retail/geniusbar/ .
Or find an Apple Authorized Service Provider https://locate.apple.com/country
If they do work (once you have secured your data on a backup drive), try resinstalling OS X.
Currently Being ModeratedOct 23, 2013 11:31 PM (in response to David gideon)
If your MacBook Air is a 2012 model it may be affected by this program: http://www.apple.com/support/macbookair-flashdrive/
Set up an appointment with a Genius.MacBooks iMacs iPads AirPorts, OS X Mavericks (10.9), 28 years Apple!
Currently Being ModeratedOct 24, 2013 12:04 AM (in response to hands4)
So dude I did all the steps you recomonded but nothing helped I can't reinstall for now because I didn't do a backup of my data so I'm trying to do that from the disk utilities and then will do the reinstall
Currently Being ModeratedOct 24, 2013 12:06 AM (in response to John Galt)
My MacBook Air is a 2012 model
Currently Being ModeratedOct 24, 2013 12:19 AM (in response to David gideon)
Then you should make a Genius Bar reservation, or contact AppleCare. The symptoms you describe are consistent with other 2012 MacBook Air models whose flash storage failed after about 14 months of use.
Currently Being ModeratedOct 24, 2013 2:55 AM (in response to David gideon)
Turn off FileVault if it is on and try.