Horos
Horos is a free, open-source medical image viewer for macOS that helps clinicians, researchers, and students open and review DICOM studies.
What is Horos?
Horos is a native macOS medical imaging application built for viewing and working with DICOM studies. It is used by clinicians, radiologists, researchers, and students who need a desktop viewer for CT, MRI, ultrasound, X-ray, and other medical image data. The app focuses on image review, study organization, and everyday diagnostic workflow support on Mac. Horos also supports tools commonly used when inspecting studies, comparing images, and preparing findings for sharing or reporting. Because it is a desktop viewer for medical images, users will typically encounter it in hospitals, clinics, research settings, and medical education workflows. Horos is published by Nimble CO LLC and is part of the Horos Project.
Key features
- Open and review DICOM medical imaging studies on Mac
- Browse and organize patient studies and imaging series
- Inspect CT, MRI, X-ray, ultrasound, and other medical image data
- Use viewing tools to zoom, pan, adjust window and level, and compare images
- Work with a 64-bit desktop viewer designed for medical imaging workflows
- Share studies and reporting-related data through supported Horos ecosystem tools
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Mostly safe
Horos is legitimate medical imaging software for macOS. It normally needs access to medical image files you open or import, and users may store sensitive health information inside its study database, so privacy and secure file handling matter. If you use it with real patient data, keep studies on properly protected storage and follow your organization’s privacy rules. Removing the app can also remove access to its local study library and related settings unless you keep backups of your data.
Recommendation: Keep Horos if you use your Mac to view or manage DICOM studies. If you no longer need it, remove it only after exporting or backing up any medical images, reports, or database content you want to keep.
Common paths
/Applications/Horos.app
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