[<< wikibooks] Online OsiriX Documentation/OsiriX System Requirements
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MacOS X 10.4 or higher.A Macintosh G3, G4, G5 or Intel computer (G5 or Intel highly recommended for 3D-4D!)For best performance:

512Mb of RAM if you plan to open more than 300 images (classic CT & MRI).1GB of RAM if you plan to open more than 800 images (multi-slice CT, PET-CT).2GB of RAM if you plan to open more than 1500 images (multi-slice PET-CT).4GB of RAM if you plan to open more than 3000 images (cardiac CT with 4D Viewer).OsiriX < ^ >