[rosser]

I can't confirm whether your approach is legit (though vPro does seem to be relevant), but I find my work machine (2015 15" rMBP) has it, and my personal (2013 13" rMBP) doesn't.

Specifically, the string you want to `grep` for is "machdep\.cpu\.brand_string".

[PhantomGremlin → rosser]

Or you can save yourself the trouble of grepping and just type:

   sysctl machdep.cpu.brand_string