LOL...
I would have never guessed your rambling (no offense) in post #12 was referring to the inability to create and/or format a partition in OS X Disk Utility.
Oh. Anyways... for the time being I've wussed out and sacrificed the scorpio black 750GB to the greater good of a quicker OS X install.
So, I've got 10.10.1 running instead of Mavericks(figured WTH), and am now down to DSDT SSDT audio etc. patching. The RT USB ac1200 is working with the RT genero drivers.
Plan now will be to have the 750GB OS X install drive reside where the ODD used to be(ordered hdd caddy), OEM hdd back to it's original spot -> as mentioned just need to start fixing up the onerous details.
Time permitting, I'll eventually mess around with removing the M$ reserved part and see how that goes, but I'm in q&d get it done today mode w/o f'ing around any longer. Assuming that I end up with time to muck around with removing the reserved part, I'll list the steps along with install replacing the original post.
Now back to digging up DSDT/SSDT info.
Clovergrowerpro got version bumped again, 3037 IIRC still builds, even built it on the g50/yosemite. (God I've got to find a compatible(or can be forced to) minipcie this ginormous USB dongle is annoying...)
[EDIT]
So, we're at:
Fastest way to get a basic OS X up and running is to either blow away the OEM drive with windows or swap that drive for a nice blank drive and install OS X per clover installer methods.
NOTE: IF looking at one of the ones with phase 1/phase 2 for me ONLY the last OS X mavericks install.app from the store had two phases. Phase 1 was merely verifying the install drive image contained within the "app" and phase 2 being the actual installing of Mavericks to the target disk/part. The downloaded Yosemite install "app" skips the image verification and just goes straight to installing, so no phase 2 required.
I only used aptiofix and uefi variables fixes and it seems to be working fine for the g50-70.
Installing to an existing win8(probably win7 too) disk will require two things IF you dig through the install OS X to an existing win8(7) installed disk:
1. UEFI part >100MB (was already 260MB on my OEM setup, so that wasn't my problem)
2. The Microsoft Reserved part(looks to be used for bitlocker) needs to be removed OR even IF Disk Utility LOOKS like it's working, it doesn't. i.e. it can't format your target part
The reserved part needs to be removed. There are instructions buried in the aforementioned thread, but should I get excited I'll try an install to OEM drive and list all the steps, barring the EFI resize, which you'll have to trust the install to existing windows drive thread for.
3. The target part need to be formatted in windows (compmgmt) or Disk Utility WILL complain and not do anything anyways
Now on to DSDT/SSDT patching on my squeaky clean drive. Let the new headaches begin!
[/EDIT]