Work with the settings and rendering of audio content for Mac systems. Gain access to the equalizers controlling the output in separate applications, desktop tools, third-party software, and even online data. Control and manage settings such as volume and frequency.
eqMac 1.8.15 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The software lies within Audio & Video Tools, more precisely General. The actual developer of this free Mac application is Bitgapp.
From the developer:
System-Wide Audio Equalizer for the Mac
Free & Open Source
Improves your Audio Listening on OSX / macOS
Experience Music on your Mac, how it is meant to be
You may want to check out more software for Mac, such as Metronome or Tagger, which might be related to eqMac.