Are you referring to the omission of the exact specs? I don't think there's much variation if any among the first-gen 12" Retina MacBooks, and with Macs usually saying the size+year+class is enough to get an idea of the specs or look them up.

Or are you saying it's because of weak hardware? Other, arguably more taxing software runs fine, but TorBrowser suffers from an uncanny slowdown.