Well, I have a working copy of OSX running perfectly, so I guess that's a good start.
Here's what happened:
I had W8.1 installed on a machine, and decided to make a dual boot 10.9. First off, I had to mix a Niresh .dmg I found with a Niresh ISO just to get the thing to boot (SMC failures). Then I had to copy files into the kexts directory for my machine from some random zip. Needless to say, the install is a total Frankenstein.
Anyhow, I went and installed 10.9 into disk 2, and everything was great (video acceleration, sound, etc). Everything worked great, EXCEPT I could only boot into OSX by booting from the USB install bootloader. I went through the process of marking the drive partition for OSX as active. (also upgraded to 10.9.4)
I booted into Windows, and used EasyBCD to create an entry for OSX, and set the drive to d: for the operating system (where OSX lives). When I select OSX from a new boot, I get a different loader (chameleon logo - press any key to boot - press f8 for advanced options). If I just hit a key, it will think for a few, then reboot. If I hit F8, it shows the expected drives to boot from. If I let it go, it will perpetually go through the think, then reboot, again and again.
So, what am I missing here? Does this have something to do with the kexts in the installer needing to be copied over to my current copy? Does it seem like I missed something? Here's what I'm thinking: since I copied the kexts into the extensions directory of the installation USB that allows the installer to work without the SMC issues, perhaps I need to copy those kexts to my Mac install as well? Totally shooting from the hip, being new at this.
Edit: I used the copy process for kexts from the sticky on the 10.9.2 to copy the kexts from the install extras directory (how I originally got past the SMC failures). No love. Complete failure even with installer - had to reinstall.
I like the idea of using the Windows BCD to boot into Mavericks - not gonna happen?
P6T Deluxe + 12Gb + I7 920