PS – Adobe PostScript files (after an automatic conversion to PDF).PDF – Portable Document Format version 1.5 + some additional features.JPEG – Joint Photographic Experts Group files.GIF – Graphics Interchange Format files.EPS – Encapsulated PostScript files (after an automatic conversion to PDF).CR2 – RAW Image file used by Canon Cameras.AI – Adobe Illustrator Artwork files (if PDF content included in file).Preview can open the following file types: Like macOS, Preview originated in the NeXTSTEP operating system by NeXT, where it was part of every release since 1989. It employs the Aqua graphical user interface, the Quartz graphics layer, and the ImageIO and Core Image frameworks. In addition to viewing and printing digital images and Portable Document Format (PDF) files, it can also edit these media types. Preview is the vendor-supplied image viewer and PDF viewer of the macOS operating system. A library of over 125,000 free and free-to-try software applications for Mac OS. 12 Reviews Downloads: 1,293 This Week Last Update: 7 hours ago See Project. The Free Unix Spectrum Emulator (Fuse): an emulator of the 1980s home computer and various clones for Unix, Mac OS X and Windows.