Can't boot to Mac osx, Error -2100F

Hi there,
I got a Macbook Pro Retina Late 2012, and I made a dual boot to Windows 7 today.
The problem is when I try to boot to Mac osx it automaticly start up as Windows 7.
I tried to use the Command key to get the Mac osx running and the only boot that I see is Windows 7.
After that i tried using Command + R to recover it and it gave me an error -2100F.
I also tried to use Boot Camp to Boot to Mac but that also goes straight to Windows.
My guess is that I deleted the wrong partition when I installed Windows 7 and that i am unable to boot to Mac osx now.
Can anyone help me fix the problem?
Thanks in Advance

Use your backup(s). Erase and restore.
Also XP is not being actively supported.
With OS X upgrades you always need to check and make sure you have the latest, like Parallels 7, or there is VirtualBox 4.x
Sounds like you simply had a corrupt hard drive.
Lion 10.7 will only support Windows 7 except in a VM.

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