Wednesday, February 13, 2013

Mac OS X 10.8 Mountain Lion Upgrade Crashes Causing Data Loss

Being a Mac OS X user, you might have thought to upgrade to its latest OS X 10.8 Mountain Lion. If yes, this article may enlighten you about a bug that Mac throws while upgrading.

Mac OS X 10.8 Mountain Lion is reported as causing installation error while upgrading to it. Additionally, it reports your existing and running hard drive as faulty and needs replacement, as suggested by Apple Technicians. This, sternly causes worry lines on your forehead thinking about replacing it, as all your data that is stored on it seems like gone!

What is the error

When you run the installer on your current Mac OS X, it runs smoothly until it reboots. After that, it runs fine up to a certain point of installation and aborts reporting your hard drive as faulty with an error message:

Incorrect number of file hard links

Bad hard link creation date

(It should be 3273005659 instead of 3314922810)
Hard link record has data extents (id = 33147751)

Error: Disk Utility can't repair this disk…disk, and restore your backed-up files.

After this, when you try to reboot, a message pops-up saying, "There was a problem installing Mac OS X. Try reinstalling.", and sinks in this loop.


Well, you do not need to worry about the bug as your hard drive is not corrupt or faulty and does not need any replacement. In fact, there is a bug in Mac OS X Mountain Lion itself that is blaming your Mac hardware for this installation crash.

In some cases, it is repaired by resetting PRAM. Therefore, restart your Mac holding ‘Cmd + option + p + r’. It beeps normally once at startup, now it should beep twice and reboot. This probably fixes the bug. If you have an updated backup of your Time Machine, restore your computer using this backup. However, if you do not have any backup, you can try below mentioned procedure to Recover Mac Data.

Run your 4.x GB Mountain Lion installer and install it on an external hard drive. Plug-in this external hard drive to your dead-Mac and restart holding option key. Pick this drive from the shown drive list and boot from it. It will configure the last phase of installation i.e. selecting OS X language and other devices. Once it finishes, migrate all your data to any other internal volume to prevent data loss and run Disk Utility to format this internal OS X volume. Now, you can run the installer again to boot on this clean Mac volume. Verify and repair this volume using Disk Utility.

Still, if you are unable to regain your data, you can go for Mountain Lion Data Recovery software. These tools are able to recover data even from formatted/deleted/lost volumes.

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