Keep getting "Reboot and Select proper Boot device" error message no matter what I try.

[AVB2000]

I've tried the troubleshooting suggestions from tonymacx86's troubleshooting section and I tried with a variety of different BIOS settings and I can't get past this error message. Someone please help!

I'm using an ASRock H61m-HVS.

 

[kiiroaka]

Seems that the bootloader wasn't written out correctly, or it wasn't written to the disc drive. Does it boot using the USB install stick?

 

[AVB2000]

Seems that the bootloader wasn't written out correctly, or it wasn't written to the disc drive. Does it boot using the USB install stick?

I only tried using a USB stick.

 

[kiiroaka]

I only tried using a USB stick.

Yes, but does it boot into the OSX login screen after choosing HFS in the Clover boot screen?

The obvious questions are:
How did you create UniBeast, Legacy or UEFI?
If you created it as UEFI did you use the boot F key to select UEFI-USB or UEFi-USB (FAT)?
If you created it as Legacy then CSM has to be enabled in the BIOS.
If it is the only drive in the PC and you created UniBeast as UEFI then try it with CSM turned off and if that doesn't work then try it with CSM turned on.