My apple macbook air will not reboot. it turns on but does not reboot completely then it shuts down and tries to reboot again and again. apple logo appears and the spinning icon rotates but never goes further then shuts down again

Hi,

Probably a bad install.

Start Mac using Command + R , install OS X on the same Hard Drive. It should fix it.

Regards

Does the Apple logo or the Pinwheel show on the screen?

There is a problem with you OSX installation. Please boot from the Recovery partition (hold Cmd+R during the startup chime), and use Startup Disk to choose the correct hard drive to boot from.
You can also restore from a backup, and not lose your data here as well.

Your best bet is to reset the System Management Controller;

http://support.apple.com/kb/ht3964

...and then reset the Parameter RAM:

http://support.apple.com/kb/ht1379

If it persists after that, try Safe Mode:

http://support.apple.com/kb/ht1455

...if that persists, try booting to your install DVD and running Disk Utility:

http://support.apple.com/kb/ts1417

..also note in this article that if for some reason you are unable to boot into your Install DVD the instructions for using fsck will do the same thing.

If that fails to resolve the issue, you'll want to reinstall the system, but that is a bit more of a sticky wicket since you're on a Macbook Air that does not have an optical drive. You can use remote disc sharing with another Mac to do this:

http://support.apple.com/kb/ht1131

...and then boot to that shared disc:

http://support.apple.com/kb/HT2129

..and then reinstall:

http://support.apple.com/kb/ht1710.

If none of these steps resolve the issue, it will likely need repair at an Apple Authorized Service Provider or Apple Store.

Try:

1. Turn your MacBook Air off by holding down the power button for about 10 seconds.
2. Hold down one of the Shift keys and press the power button for a few seconds. Keep holding the shift key for about 1/2 minute. This will start the machine in "Safe Mode." It will check to make sure there are no errors on your hard drive and do other tasks to hopefully fix your problem.
3. Once you see your Desktop (if you do), click the Apple menu and click "Shutdown".
4. Start the computer normally by holding down the power button for a couple seconds.

If this doesn't work, you may need to reinstall the operating system. On a MacBook Air, that's a bit more complicated. You'll need either the external DVD drive (an optional purchase for the Air) or another computer. Your computer manual explains how to install software on that other computer (may or may not be necessary) so that you can use that computer's DVD drive to put the disc in and reinstall Mac OS X operating system.

Good luck! Please let us know if you have further questions or problems.

* If you find this information helpful, please rate my solutions and recommend me. Thanks! *

Power the machine down. Press the power button to turn it on. After you hear the startup chime, press and hold the shift key. This will trigger an extended file system check and a safe boot. Continue holding the shift key down until you see the spinner, then you can release it. If it doesn't boot completely after this, you will have to bring it in to an Apple-certified tech for repair.

When troubleshooting a Macbook Air, there is a checklist from Apple Support you need to try.
You are welcome to do so after first trying these steps first.

• Check the Magsafe power adapter, to make sure it is free of debris and is seated properly.

• If with decent charge, try to start the Macbook Air, with only the battery.

If you get power from either one of these issue resolved- otherwise follow the steps provide more in detail from Apple listed in the link below.
-------------------------------------------------------------------
Apple Support Link:
Troubleshooting Macbook Air (additional steps)
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Such power issues with Macbook Airs as well as Macbook 13" and Macbook Pro 13" are about the same and there are no workarounds, so make sure to follow those procedures completely for a full assessment of your Macbook Air's functionality.

Hope this helps!

Regards,

-Mactechtrainer

insert your Mac OS dvd .. and hold down the c key as you restart. it should launch on the dvd's system and allow you to boot. in the menu select Disk Utility and run the program and see if it can restore your hard drive...

It may need to remount the drive...

Let me know if that helps...

Hold the power button down. Keep it down until the unit powers off. Then press power to start the machine up, and as soon as you hear the starting chime (boooong) press Command+Option+P+R and keep them held down until you hear the startup sound 3 times. Then you can let go and it should start normally.

Press and hold the power button. After a few seconds, the MAcBook will shut down.
Regards,
Cybernanga

If you get the Apple logo with spinning lines underneath it but not getting past this stage then the hard disc is being seen but something is failing in the boot process, causing it to stall.
Most likely this is a case of incorrect file permissions which is easily solved.
There are 2 ways of doing it, depending on whether you have an OS X install disc to hand or not.
IF YOU DO HAVE AN OS X INSTALL DISC:
Insert the disc into the DVD drive, power on the Mac on after hearing the chime hold down the C key. This forces the Mac to boot from the DVD. After a few minutes you'll get a screen asking which language you wish to use as the main language; select English or whichever is appropriate for you.
On the next screen the Installer box will appear. Ignore this and instead on the menu at the top of the screen select Utilities -> Disc Utility. Once this has loaded select your hard drive on the left hand pane and then first click "Repair Disc" and once that has finished click "Repair Permissions".
Once these have completed successfully reboot and OS X should load up fine.
IF YOU DON'T HAVE AN OS X INSTALL DISC:
This is a bit more tricky. You have to boot into single user mode. To do this power on the machine, and after the chime hold down Cmd (Apple key) and S together. The screen will turn black and an a load of white text will start appearing and scrolling upward as the system loads. Basically this is what happens behind the Apple startup logo, only in single user mode rather than multiple user mode.
After a few moments the text should stop scrolling and you should see a prompt which looks similar to:
localhost: / root#:
Note that localhost is the name of your computer so will possibly be different to "localhost". At this point type the following EXACTLY including spaces, capitalisation and dashes etc:
/sbin/fsck -fy
now press enter, then type:
/sbin/mount -uw /
now press enter then type:
diskutil repairPermissions /
and press enter. It may take a few minutes to repair the disc's permissions, but once complete you should have the 
localhost: / root#:

prompt again. Now type:
reboot
and hit enter. The system will then reboot and should boot into OS X without issue.