frogminer: legacy method

At the moment, we don't recommend Frogminer, as we have better and more efficient methods. If you can, go back to the Seedminer directory and pick a different method.
If, for some reason, you need to use Frogminer, here's some instructions.
Frogminer requires access to the Homebrew Menu. If you don't already have access, I'll suggest Pichaxx. If you do already have it, you can skip the Pichaxx section.