Best way to install eqMac2 is from the website: https://bitgapp.com/eqmac
Or if you use Homebrew: brew cask install eqmac
If you are interested to know how eqMac was created, you can read the Story
If you are an Objective-C / C++ developer, please read the Contribution Guide
If you are a user, you can always help by Reporting Bugs and/or making direct contributions from the website
I basically took Apple's CAPlayThrough example and modified the AUGraph to have an EQ node. Combined it with SoundFlower Audio Driver and it just worked.
