Resizing the C:\ drive under Windows(bootcamp) corrupted mac partitions. Neither Mac OS X nor Windows are able to boot. Holding the Option(ALT) key shows only Windows, which can't boot.
How do I recover the Mac partition table? I heard TestDisk could fix that, but how do I run it?
There is not much you can do with a stock Mac to fix the hard drive.
You could plug the hard drive in another Mac (as a secondary drive, not a boot one) and see what Disk Utility tells you (press command-space then type Disk Utility to launch it) about it but it's not guaranteed to help you much. I am not even sure it can correctly repair a boot hard drive.
Your best bet is using a disk repair program such as DiskWarrior (http://www.alsoft.com/diskwarrior/).
It costs a bit but has a very good reputation and saved many damaged hard drives. Cf http://daringfireball.net/2010/03/ode_to_diskwarrior_superduper_dropbox for a great example of it saving important data.
Windows had changed the HD partition map from GUID Partition Table(GPD) to MBR. And made HD a "dynamic disk". This is why Mac Os wasn't able to boot.
So, I've tried 1001 ways to recover. Nothing worked. Interned Recovery gives -2002F error. Macbook pro 2012 can't boot from bootable DVD to use DiskWarrior, Drive Genius or similar. It can't boot from OS X Lion install DVD. I could boot Windows recovery console and tried TestDisk which failed to write something to HFS+. Also tried some Windows third party applications which also failed.
I asked a friend with latest Mavericks(which I had too) to make a Recovery USB using OS X Recovery Disk Assistant v1.0 and make a DMG file from it using Disk Utility and send me over internet. Then I used the TransMac application under Windows and burned DMG on my USB stick. I was able to boot from this USB stick into Recovery Mode and from there I can reinstall Mac Os X Mavericks. Somehow it sees my Ethernet cable and doesn't give error.
Note: that Disk Utility wasn't able to recover partitions. I tried to run DiskWarrior from terminal but it gave me an error. TestDisk didn't run too. I could recover or backup my files using Paragon Rescue Kit for Mac Bootable CD, but there was no need since it's my new macbook and I didn't have much files there. I made a clean installation on a USB stick and run DiskWarrior and Drive Genius, none of them could fix partitions. So I gave up and reformatted HD.
That's probably not the answer on how to fix partitions, but that's how I solved this. If somebody finds a way to fix partitions please post as an answer.
The new version of DiskWarrior (version 5, around 120$) can fix partition table damage and may possibly be able to fix this.
