I would like to announce the Miele-LXIV project, a 100% DICOM standard compliant image viewer for macOS.
If you want build the project with all its dependencies yourself then start here: https://github.com/bettar/miele-lxiv-easy
You can also install the build binary directly from the macApp Store: https://itunes.apple.com/us/app/miele-lxiv/id988332475?mt=12
The software is 100% free, the License is GPLv3.0.
The Software has been localized for English, German, French, Italian, Spanish, Chinese and Japanese.
Please let us know if there are any questions.