Which classic Mac and NeXT operating system versions are available on Infinite Mac?

Infinite Mac hosts a browsable collection of classic Macintosh and NeXT system releases, from the original 1984 System 1.0 through Mac OS X and NeXTStep releases of the early 2000s. Each release runs inside a virtual machine in your browser, and most entries include an "Infinite HD" disk with representative software from that era. You can pick a version directly, or use the custom option to choose your own machine and disks.

How the collection is organized

Releases are grouped by year (1984, 1985, 1986, and so on) and can be filtered by category:

Each entry lists a release date, a short description of what the version introduced, and two actions: Customize... and Run.

Early System Software (1984–1988)

• System 1.0 — January 24, 1984. The initial system software release, shipped with the Mac 128K.
• System 2.0 — April 8, 1985. Added the "New Folder" and "Shut Down" commands, the MiniFinder, and the Choose Printer DA, plus icons in list view and the Command-Shift-3 screenshot FKEY.
• System 2.1 — September 17, 1985. Added support for the Hard Disk 20 drive and the HFS file system.
• System 3.0 — January 16, 1986. More complete HFS support, a RAM disk cache, zoom boxes for windows, and a redesigned control panel. Introduced with the Mac Plus.
• System 5.0 — October 8, 1987. Introduced MultiFinder, a revised Finder about box, and improved printing support.
• System 6.0 — April 30, 1988. Added MacroMaker, Map, and CloseView utilities.

A/UX (1988–1989)

• A/UX 1.0 — February 9, 1988. Initial release, combining UNIX System V Release 2 with BSD networking, TCP/IP, and NFS. Could run only one Macintosh Toolbox application at a time.
• A/UX 1.1 — February 10, 1989. Expanded Macintosh compatibility with HyperCard, color displays, and CD-ROM support, plus much faster disk and SCSI I/O.

NeXTStep (1988–1989)

• NeXTStep 0.8 — October 12, 1988. First publicly available preview release, including the Mach kernel, an object-oriented API based on Objective-C, a Display PostScript-powered UI, and several applications.
• NeXTStep 1.0 — September 11, 1989. Added the ability to kill applications from Workspace Manager, a redesigned Preferences application with additional features, and other polish.

What else is in the collection

Beyond the entries listed above, Infinite Mac covers System Software, Mac OS, A/UX, Mac OS X, and NeXTStep releases spanning the 1980s, 1990s, and early 2000s — 81 releases in total, with 32 marked as notable. The site also offers an "Infinite HD" disk with representative software from each era, and a custom option for choosing your own machine and disks.

Running a version and moving files

Select any release and choose Run to boot it in a browser-based virtual machine. On some operating systems you can import and export files and disk images using drag and drop, and mount virtual CD-ROMs. The welcome screen inside each machine explains the specifics for that system.

Related options on the site

Infinite Mac also lets you embed instances into your own site, view recent changes, and donate to support the project.