Depending on your hardware and macOS version, you have three primary sources for downloading the software:
Older releases and source files can be found on the DisplayCAL SourceForge repository. Installation Guide for Mac
The standard version (v3.8.9.3) is available at DisplayCAL.net.
Installing DisplayCAL on macOS requires a few additional steps due to its dependency on ArgyllCMS and Apple's security protocols.
For newer macOS versions like Sonoma or Sequoia , users recommend the DisplayCAL-py3 port, which fixes compatibility issues with older Python 2 versions.
DisplayCAL is a powerful, open-source display calibration and profiling solution known for its precision and advanced features compared to standard vendor software. For Mac users, especially those in color-critical fields like photography or video editing, it serves as a sophisticated graphical interface for the ArgyllCMS color management system. Where to Download DisplayCAL for Mac