OS X cannot start up from this drive.

[gabu226]

I already figured out MBR & GPT, after this I'm getting a message saying "OS X cannot start up from this drive" when I try to choose my drive for install. I have tried various drives with the same result. The latest drive I'm trying to use for install is a new Intel SSD 520 120gbs.
Its probably simple (first time time dealing with hackintosh or mac) I hope someone has a quick and useful answer!
Thx

 

[gabu226]

I had already changed that. If u dont change that 1st thing ML installer will say on disk is that u need to partition to guid partition. It didnt take me long to figure that out. After changing that it now says "OS X cannot start up from this drive". This is what I need an answer for.