Downgrading

[tzahi]

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I upgraded to Mac OS X Mountain Lion. It does not start, it just stays at a loading screen with the apple logo. I can only use recovery mode, and there is an option for reinstalling, but I am unable to do that. Is there any way I can downgrade to lion from recovery mode?

EDIT: I do not have a backup. Yes, I am an idiot for not backing it up, but I don't have an external HD to do so.

 

[dgbowers]

According to someone from the Mountain Lion board, ML apparently puts new Firmware on your HDD, and makes it pretty hard to downgrade. That's just from a quick read through of the ML board though.

Short of pulling the drive, reinstalling on a new one, and migrating your data over, I can't think of a good way to fix that.