@bshanks Where did you find the connection between CPUFAMILY_ARM_HIDRA and H17G? In Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/mach/machine.h I see this:

#define CPUFAMILY_ARM_HIDRA 0x1d5a87e8

I can't figure out how 0x1d5a87e8 would become H17G.