Infinite Mac is a collection of classic Macintosh and NeXT operating systems and software, all easily accessible from the comfort of a web browser.

Pick any version of System Software, A/UX, NeXTStep, Mac OS or Mac OS X from the 1980s, 1990s or early 2000s and run it within a virtual machine. An “Infinite HD” disk with representative software from that era is also available. You can also run a custom version with your choice of machine and disks. On some operating systems files and disk images can be imported and exported using drag and drop and virtual CD-ROMs can be mounted – refer to the welcome screen in each machine for more details.

You can learn more, embed instances into your own site, monkey around, see what's changed recently or donate to support this project.

Releases:

1988

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 1.0.1
September 1, 1988

Hardware compatibility update adding support for the Macintosh IIx and Macintosh II FDHD or logic-board upgrades.

1989

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.

A/UX 1.1.1
September 12, 1989

Final 1.x release, adding official Macintosh IIci and SE/30 support and a universal update from every earlier 1.x release.

1990

A/UX 2.0
May 9, 1990

Introduced a Finder desktop that ran multiple Macintosh, UNIX and X applications, with UNIX files accessible directly in the Finder.

1991

A/UX 2.0.1
January 30, 1991

Added Macintosh IIsi and multiple-monitor support, System 6.0.7, MacX 1.1 and final POSIX 1003.1-1990 conformance.

1992

A/UX 3.0
March 9, 1992

Integrated System 7 features including file sharing, aliases, TrueType and QuickTime; added Quadra support and an easier installer. Improved peripheral compatibility and UNIX communications.

1993

A/UX 3.0.1
April 9, 1993

Added asynchronous I/O, multibus SCSI and SCSI DMA, auto-login mode, and support for the Quadra 800 and Workgroup Server 95.

A/UX 3.0.2
September 1, 1993

Maintenance tune-up improving Finder file handling, locking and crash recovery, security, server performance and hardware compatibility.

1994

A/UX 3.1
February 25, 1994

Improved I/O and Macintosh compatibility; added removable SCSI and broader CD-ROM support, 4 GB UNIX file systems and updated networking.

A/UX 3.1.1
November 17, 1994

Final maintenance release, improving Finder and resource-fork performance and fixing Macintosh, AppleTalk, NFS, kernel and locking failures.

2026

Custom
October 7, 2026

Build a custom instance, using your choice of emulated machine and disk images.