AUXrunner: a macOS QEMU-based app for running A/UX

A macOS QEMU-based app for running A/UX contains a standalone app, based on QEMU, that runs Apple's A/UX operating system. I built the A/UX setup using this guide and with extensive, essential help from Cat_7 in this thread at

To use it, simply launch the app. If you hold down the Option key while launching it, it will offer to open the command file inside it and also open a Finder window on the folder that contains the files.

You can ftp to the A/UX system by starting an ftp session with the host address that is the same as your Mac computer, with the username and password "user" and "password" and port 2121 (not 21).

When you shut down A/UX, press Ctrl-Opt-g to release the mouse, and then Cmd-Q to quit QEMU.

By default the app opens to the root account, which has no password. The documentation (see below) explains how to log in to menu that asks for a username and password, and to log in to different kinds of sessions. The setup supplied here as a root account and a user acount named "user" with the password "password".

If the app won't start: If the app doesn't start on your system, do this. Open a terminal; type this string into the terminal window:

sudo xattr -rc

followed by a space (the space is essential). Then drag the app into the terminal window so that its path appears on the command line. Press return to run the command. The app should now start.

A/UX documentation from Apple:

Edward Mendelson (em thirty-six [at] columbia [dot] edu, but with two initials and two numerals before the [at] sign, not spelled out as shown here).