Ozmosis

Which rev. does your mainboard have?

First of all create a MacOS install thumb drive as explained in the Wiki with your working Hackintosh.
Then download this BIOS file and flash it: Mod für das B75M-D3H Rev 1.2
Afterward set the BIOS Settings as explained in the Wiki and finally try to boot from your USB thumb drive

@Sofista
There is no performance difference between Ozmosis and Clover, if configured correctly.
Both ways can be configured, either with a Defaults.plist (Ozmosis) or a Config.plist (Clover).

Since when can Ozmosis corrupt the BIOS of a motherboard?
What especially do you mean with that anyway?

As far as i know, your Mainboard has a second BIOS CHIP. With Ozmosis you flash the first one and if something goes wrong, you can recover your first BIOS (which is always loaded) with the second one on the motherboard. I personally never heard that the Ozmosis BIOS corrupted any BIOS Chip.

Ozmosis was already installed and running on his box, as far as I know.
In that case I can't imagine anything being corrupted in the BIOS, because the system already worked...
That's why I asked for more information about the kind of corruption.

But to answer your question: it is possible to triple boot on an Ozmosis based computer

If OZ ist working as intended there´s no need for a tutorial since you install OS-X just like you would do on any genuine MAC. In short download your desired OS-X Version from the Mac App Store and use the CreateInstallMedia Command to create a bootable USB Installer. Once done plug in your USB Installer and boot up your PC using the created Installer and install OS-X right away...