DICOM viewer for Mac — open .dcm in the browser

Searches for dicom viewer mac usually mean “how do I see my hospital CD or portal download on my Mac?” DICOM Reader runs in Safari or Chrome: upload the full study folder from Finder, scroll your series, and optionally generate a plain-English, AI-assisted informational summary with frame citations. Not a medical diagnosis; not a replacement for your care team.

Why Finder does not “just open” DICOM

macOS may show hundreds of .dcm files or files with no extension. That is normal. Preview is not a clinical DICOM viewer for full studies. You either install a desktop viewer (often aimed at professionals) or use a web-based DICOM viewer like DICOM Reader.

From a disc or USB on Mac

Insert the media, open it in Finder, locate the folder that contains your slices (sometimes named DICOM or IMAGES), and copy it to Documents or Desktop. Then upload that folder after you sign in at dicom-reader.com. More detail: hospital CD, USB & DICOM guide.

Compared to desktop Mac viewers

Apps such as Horos (open-source) or Osirix are powerful for reading rooms. DICOM Reader is intentionally different: patients who want plain language, no install, and chat grounded in their upload. For a direct feature comparison, see DICOM Reader vs desktop viewers (RadiAnt).

All platforms — DICOM file viewer · Upload DICOM online · AI radiology report