What to select for Device ID spoof for a Mid-2012 Unibody MacBookPro9,1?

Each and every time I do this It just never works, I've followed numerous guides all to the same end... "THis Version of macOS is not supported on your system"

What am I doing wrong, and how can I keep/continue to use the SDXC/SD card reader built into this MacBookPro9,1, as well as using it's DVD drive (I've got one that does Blu-ray & M-Disc).

submitted by /u/threeimaginaryboiz
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