QuickGamma is not available for Mac but there are a few alternatives that runs on macOS with similar functionality. The best Mac alternative is DisplayCAL (formerly known as dispcalGUI), which is both free and Open Source. If that doesn't suit you, our users have ranked five alternatives to QuickGamma and three of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to QuickGamma are SuperCal (Paid) and ColorHCFR (Free, Open Source).
Video Projector/Monitor Calibration Software orginally developed as ColorHCFR. This code base is based off version 2.1 and will aim for a more open development process. The opensource version integrates an ArgyllCMS interface for continued meter support and development.