Top 10+ Free & Open source DICOM Viewers for Mac OSX

Top 10+ Free & Open source  DICOM Viewers for Mac OSX

Nowadays Many doctors and medical professionals prefer Mac OSX, Though finding medical open source/ free professional software is not easy task, which forces many users into commercial solutions, That's ok if the user is located a country with such software service provider as US, but for other countries MacOSX  software market is not that friendly so as medical software service providers which push their product into certain countries.

In this article we have collected the best DICOM viewers for Mac OSX, starting with the native ones that uses Apple's native programming languages, libraries, and frameworks, then we proceed to the cross-platform projects.

1- Horos: Native DICOM viewer for MacOSX

Horos is a native macOSX DICOM viewer.  Horos is the only DICOM viewer in this list that comes with comprehensive tutorials, training courses and full functional enterprise-ready cloud platform. As Horos is a native macOSX app expect the best performance regarding speed, and compatibility with the older/ newer versions of macOSX versions.

Horos features

Horos comes with advanced DICOM displaying features including many manipulation and measurement tools, 3D surface rendering, image fusion for PET-CT/ SPECT-CT.  It comes with OsiriX migration assistant tool which makes it easy for doctors to migrate their docs/ configurations from OsiriX to Horos with ease.

Horos project is a free open source project that released under LGPL V3.0

2- Miele-lxiv: Free Native Open source DICOM workstation  


Miele-LXIV   is an open source/ free DICOM workstation that built on OsiriX. I comes with multi-languages support ( English, German, French, Chinese, German, Italian, Japanese, Spanish).

Miele-lxiv DICOM viewer features

Miele-lxiv features include exporting DICOM images to multiple formats including still images (JPEG, PNG), It has simple native look and feel for macOSX that integrates DICOM display options seamlessly with the interface.  It supports all DICOM formats, DICOM metadata, writing to DICOM CD/DVD and supports many PACS/ DICOM networks.

The viewer supports 2D with multiple view layouts, 3D rendering including 3D surface and volume rendering, and 3D exports to Quicktime videos or still images.

Miele-lxiv has many Hardware acceleration improvements for mac OSX which includes:

  • Multi-threaded for multi-processors and multi-core processors support
  • Asyncronous reading
  • OpenGL for 2D Viewer and all 3D Viewers
  • Graphic board accelerated, with 3D texture mapping support

It was upgraded this month to support macOSX Mojave with the dark mode as it supports many macOSX versions as macOS 10.9 to later versions.

Miele-lxiv was released first under OsiriX-lxiv by Alex Bettarini a freelance software engineer from Italy.

Miele-LXIV @ iTune Appstore

3- mRay

mRay is a free DICOM viewer program created by a german company that released it for Mac OSX other platforms. mRay provides PACS compatibility to many PACS platforms,  which makes it easier for hospitals with different radiology stack to adapt it.

mRay DICOM viewer features

mRay supports viewing most of the DICOM modalities (like: computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), fluoroscopy (XA), digital x-ray (CR), ultrasound (US) ) , It comes with usable clean user-interface, packed with advanced query/ retrieve options.

mRay is not just for macOSX it is also supports iOS platforms ( iPad/ iPhone), Windows platforms and Android devices which makes it portable to ease the work for radiologists and save time.  Though mRay is built for the enterprise, Its not totally free, it requires mRay Server to be able to use mRay with PACS, mRay Server can be installed for free and used for an evaluation period.

4- 3Dim Viewer

3Dim Viewer is a  free lightweight DICOM viewer by a company from Czech Republic that released it for free under Apache License V2.0.  It is written in C++ and uses Qt library.

3Dim DICOM viewer features

3Dim Viewer basic features: 3D visualization of volumetric medical images,  Multiplanar and orthogonal XY, XZ and YZ views, Adjustable density window, Density and distance measuring, DICOM dataset import., Volume rendering using shaders running on NVidia and ATI graphic cards, Tissue segmentation based on thresholding, Surface modeling of any segmented tissue, and 3D surface rendering.

The most important feature for 3Dim viewer is hardware rendering as using graphic cards to render high detailed 3D images with shaders with makes it the best choice for researchers, and radiologists who wanna use advanced 3D rendering with gaming-grade gears like Nvidia and ATI cards.

5- Weasis DICOM viewer

Weasis is a multipurpose standalone desktop and web DICOM viewer project, that is released to provide PACS-ready support that works on many platforms as macOSX, Windows and Linux.

Weasis is aiming to provide a complete integrated open source solution for hospital information systems (HIS), and Radiology Information Systems (RIS).

On technical note Weasis uses OpenCV, the open source computer vision library that provides real-time processing with best performance as it was built with C/ C++.

Weasis requires Java to run on macOSX and other platforms (Windows, Linux), for the new macOSX versions it requires disabling GateKeeper to run.

6- Amide

AMIDE is an open source DICOM viewer that works for MacOSX/ Windows and Linux.  I have used Amide for years on Linux, It has an amazing performance on almost all platforms including mac OSX/ Windows, all are in true Libre/ open source packed.

AMIDE DICOM viewer has advanced enterprise-grade viewing features with measurement and manipulation tools. It imports the modern DICOM files, raw data files and legacy DICOM files without issue. AMIDE supports images file exports in multiple formats and video format as Fly-through-movie can be generated as MPEG1 video file.

7- Ginkgo CADx

Ginkgo CADx is an advanced DICOM viewer and dicomizer (converts png, jpeg, bmp, pdf, tiff to DICOM).

Ginkgo CADs is an open source DICOM viewer that supports many desktop environments including mac OSX, Windows (PC), and Linux. It provides .dmg (disk image file) that contain the compiled application.

Ginkgo supports many DICOM modalities and file manipulation tool that supports DICOM files conversions to still images. Note that Ginkgo has not been updated since 3 years so it may not be compatible with the new releases of macOSX.

8- Open DICOM viewer (JAVA)

Open DICOM viewer is a lightweight cross-platform application to display/ view DICOM images in a web page or CD/ DVD.   It's built with Java so it works on mac OSX, Windows and Linux but requires Java to work. Though it was not updated since 2015 but it works great and getting thousands of download hits every month.

9- Dicompyler

Dicompyler is a lightweight  extensible open source radiation therapy research platform based on the DICOM standard. It also functions as a cross-platform DICOM RT viewer.

Dicompyler was written in Python which makes it run smoothly on other platforms as MacOSX, Linux (Debian, Ubuntu, Fedora, OpenSUSE), and Windows.

Dicompyler imports many DICOM modalities display them with 2D image viewer , It has a plugin system that allow developers to extend its functionalities by building their own plugins

For the new versions of macOSX as 10.5 and above it has to bypass GateKeeper to run.


SMILI (Simple Medical Imaging Library Interface) is a DICOM library/ program that contains a large set of functionalities to process, convert DICOM files. It is built to work on all known platforms including Mac OSX, Linux and Windows.

SMILI's features:

DICOM image processing, surface processing, DICOM viewer with measurement tools and advancing display options, Surface/Model Visualisation, anonymizing tool to remove the sensitive data, shape modelling and analysis, animation for surfaces, and n-D Image Visualisation.

SMILI's UI is built with Qt library, but it provides a command-line interface as well for experienced users, which can take advantage of extending its default functionalities with python scripting.

SMILI is the development-ready framework for building a features-rich DICOM viewer/ workstation.

SMILI uses several powerful open source libraries and frameworks like: Qt for the interface, Insight Toolkit (ITK), and Visualization Toolkit (VTK).

11- DICOM Image Reader

DICOM Image Reader is a DICOM viewer that built with Web technologies: JavaScript, HTML5, NodeJS that packed in a desktop application using Electron Framework. It can open, read DICOM files (.dcm) files with ease as they load into the viewer which comes with image manipulation tools contrast, zoom, drag, and filters.

DICOM Image Reader has a disk image (.dmg) file that contain the application for MacOSX, It also provides Windows executable and Linux ready files.


The most compatible macOSX native DICOM apps I would recommend are: Horos and Miele-lxiv as both are mac Native apps and open source. Horos is providing training and  comprehensive documentation for its users as it has growing community of users and doctors including developers and researchers. However, I would recommend 3Dim Viewer for its better 3D capabilities. If you are a developer and looking to build your own DICOM system that integrates with RIS or HIS Weasis and SIMLI are the best choice, I would go for Weasis  as they provide multi-platform support, and it's in fairly new with active development and support.

Photo by rawpixel.com from Pexels

DICOMMacOSXOpen sourceFreeListMedical Imaging

Hamza Mu

Hamza Mu

A physician with programming skills, Linux user since late 1990s, Open source supporter . Doing coding with Python, NodeJS (Meteor, VueJS, Express, D3, PhantomJS), SmallTalk & R language.

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Top 10+ Free & Open source DICOM Viewers for Mac OSX
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