This guide is for dentists, specialists and clinic IT staff who have used RadiAnt DICOM Viewer on a Windows PC and now need to open CBCT scans and X-rays on a Mac. It is also for anyone who searched for a RadiAnt Mac download and could not find one.
The short answer: there is no RadiAnt for Mac. RadiAnt DICOM Viewer from Medixant is a Windows program, and the official download lists only Windows 11, 10, 8.1, 8 and 7. Medixant describes an unofficial way to run it on macOS with CrossOver, but it does not support it and warns that some features may be unavailable or crash. For most dental work on a Mac, a native free viewer is the better choice: Horos if the team uses only Macs, and Weasis if it mixes Macs and PCs. Both are open source, and both can do something RadiAnt cannot: build a panoramic-style view from a CBCT with curved MPR.
RadiAnt and its Mac alternatives side by side
| Item | RadiAnt DICOM Viewer | Horos | Weasis |
|---|---|---|---|
| Licence | Shareware (conditionally free): full-featured trial, paid licence for continued use | Free, open source (LGPL 3.0) | Free, open source (EPL 2.0 or Apache 2.0) |
| Runs natively on a Mac | No (Windows only; CrossOver workaround is unsupported) | Yes (macOS only) | Yes (also Windows and Linux) |
| Current version | 2026.1 (August 2026) | 4.0.1 for Apple Silicon; 4.0.0 RC5 for Intel | 4.7.3 (August 2026) |
| Apple Silicon | Only through CrossOver | Separate Apple Silicon build | Separate Apple Silicon package (macOS 12 or later) |
| Oblique MPR | Yes | Yes | Yes |
| Curved MPR along the arch | No | Yes | Yes |
| 3D volume rendering | Yes | Yes | Yes |
| STL export | Yes | Yes (also OBJ and VRML) | No (STL import as DICOM only) |
| PACS query/retrieve | Yes | Yes | Yes, plus DICOMweb |
| Certified medical device | No; licence terms forbid diagnostic use | No FDA or CE claim | Open-source build is not CE or FDA certified |
Why there is no RadiAnt download for Mac
Medixant states that RadiAnt is designed and tested for Windows and that it does not officially support other operating systems. The download buttons on the official site cover Windows 7 to 11 only, and the CD/DVD edition that clinics put on patient discs also autoruns only on Windows. There is no iPad, iPhone, Android or Linux version either.
So any page offering a “RadiAnt for Mac” or “RadiAnt for macOS” installer is not offering a Medixant product. If you see one, do not install it.
Option 1: Run RadiAnt on a Mac with CrossOver
Medixant’s own help page explains how to run RadiAnt on macOS with CrossOver Mac, a paid Windows compatibility layer. Its guidance covers macOS 14 Sonoma on both Intel and Apple Silicon Macs, as well as older releases such as Big Sur and Catalina. For Catalina it also mentions an open-source Wine package. The page is mostly a set of video walkthroughs rather than written steps.
Keep these caveats in mind before you choose this route:
- It is unsupported. Medixant says some features may be unavailable or may cause the program to crash. If something breaks, you are on your own.
- Activation needs a settings change. To avoid activation problems, Medixant says you must turn off MAC address randomization on the Mac. It links to a separate guide for activation issues on macOS.
- The licence question does not go away. RadiAnt stays shareware (conditionally free) under CrossOver. After the evaluation, regular use still needs a paid licence, and you also need CrossOver itself.
- Guidance lags behind macOS. The newest macOS version named on the page is Sonoma. On later macOS releases you are testing it yourself.
This route makes sense only if you already own a RadiAnt licence and depend on a feature you know well, for example its fast STL export or a workflow your staff has been trained on. For a dentist who just needs to open a CBCT from a referral, it adds cost and risk for no gain.
Option 2: Horos, the free native Mac viewer
Horos is a free, open-source viewer for macOS, forked from OsiriX and released under the LGPL 3.0. The download page offers version 4.0.1 for Apple Silicon, which the project recommends for macOS 26 Tahoe, and 4.0.0 (RC5) for Intel Macs.
For a former RadiAnt user, most habits carry over:
- Opening a study: instead of opening a folder directly, you import it into the Horos database (drag the DICOM folder into the database window), then open the series.
- MPR and 3D: orthogonal and oblique MPR, volume rendering and surface rendering are all there.
- STL export: like RadiAnt, Horos exports rendered surfaces to STL, plus OBJ and VRML. Set the threshold by eye, because CBCT grey values are not calibrated like medical CT, and clean the mesh before printing.
- Curved MPR: click points along the centre of the arch on an axial slice and Horos produces a straightened, panoramic-style reformation with cross-sections. RadiAnt has no equivalent.
Two practical tips from the Horos FAQ: do not keep the Horos database in iCloud, because syncing it between Macs can corrupt it, and if Horos crashes on start, replace the HorosCloud plug-in. Releases are infrequent, and help comes from the community.
Option 3: Weasis, one viewer for Mac and Windows
Weasis is free and open source, dual-licensed under EPL 2.0 and Apache 2.0, and it is actively developed. Version 4.7.3 was released on 25 August 2026. On a Mac you install the PKG for your processor (Apple Silicon needs macOS 12 or later, Intel needs macOS 11 or later), or IT staff can use brew install --cask weasis.
Weasis suits clinics where the front desk uses Windows and the dentists use Macs, because the same viewer and the same steps work on both. For CBCT it offers oblique MPR, a curved MPR designed for tracing the dental arch, 3D volume rendering and calibrated measurements. For sharing, it can export a study as an ISO image with Weasis embedded, so a referring dentist can open it without vendor software.
The main gap compared with RadiAnt: Weasis cannot export a 3D model to STL. If you need printable models, use Horos on the Mac or a segmentation tool.
Which one should you use
- Mac-only practice, occasional CBCT review and STL models: Horos.
- Mixed Mac and Windows clinic, or you want frequent updates and PACS/DICOMweb: Weasis.
- You already own a RadiAnt licence and must keep its exact workflow: try CrossOver, test it on your own scans first, and keep a native viewer as a fallback.
- You only received one scan on a disc: any of the free viewers will do. Copy the disc to the Mac first and open the local copy.
For a wider list that also covers Planmeca Romexis Viewer, VolView, 3D Slicer and InVesalius, see our guide to free DICOM viewers for Mac.
Limitations
- None of the three tools is a certified diagnostic device in the form described here. Medixant’s licence terms say RadiAnt must not be used for diagnostic or therapeutic decisions; Horos makes no FDA or CE claim; the open-source Weasis build is not CE or FDA certified. Follow your local rules for primary diagnosis.
- None of them plans implants, holds implant libraries or designs surgical guides.
- Horos and Weasis are desktop programs. There is no iPad or iPhone version of either, just as there is none of RadiAnt.
- Free viewers read standard DICOM. A scan exported in a vendor’s proprietary format needs that vendor’s viewer or a fresh DICOM export from the clinic.
FAQ
Is there a RadiAnt DICOM Viewer free download for Mac?
No. Medixant offers RadiAnt only for Windows. The only Mac route it describes is running the Windows version under CrossOver, which it does not support.
How do I install RadiAnt DICOM Viewer on a Mac?
Medixant’s help page shows how to run it with CrossOver Mac, with video guides for several macOS versions. Turn off MAC address randomization first to avoid activation problems, and expect that some features may not work.
Is RadiAnt DICOM Viewer free?
No. It is shareware (conditionally free): the trial includes every feature, and regular use requires a paid licence. Horos and Weasis are free and open source.
Is there RadiAnt for iPad?
No. RadiAnt runs only on Windows PCs, and neither Horos nor Weasis has an iPad version.
Horos vs RadiAnt: which is better on a Mac?
Horos, because it runs natively, is free and adds curved MPR. RadiAnt on a Mac depends on an unsupported compatibility layer.
What is the best free RadiAnt alternative?
Weasis, if you need one viewer across Mac, Windows and Linux. Horos, if every computer in the practice is a Mac and you want STL export.
Last updated: 8 October 2026 · DentIIT editorial team. Licence, version and platform details are checked against each developer's official documentation; none of the tools listed here should be treated as a certified medical device unless its vendor says so.
