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Apple bough a port of UniSoft SYSVr2 to the Apple platoform and dubbed it A/UX. Version 2 onward were technically significant as ToolBox and Finder had been po

Apple bough a port of UniSoft SYSVr2 to the Apple platoform and dubbed it A/UX. Version 2 onward were technically significant as ToolBox and Finder had been ported to Unix and allowed MacOS apps to run on top of Unix. They didn't offer process virtualization so they could all crash eachother out.

Lammy 5y ago
The A/UX Toolbox PDFs cover a lot of interesting technical details for the curious: http://bitsavers.org/pdf/apple/mac/a_ux/aux_2.0/030-0787-A_AUX_Toolbox_Macintosh_ROM_Interface_1990.pdf http://bitsavers.org/pdf/apple/mac/a_ux/aux_2.0/030-0787-A_A... "/mac/sys — This directory contains the system folders for startup and login. The System file provided with Release 2.0 of A/UX is almost identical in functionality to the System file provided with Release 6.0.5 of the Macintosh system software." Additionally I always thought the Gestalt Manager was a System 7 thing and was surprised to learn it was introduced along with system 6.0.4 and A/UX so applications could tell if they were running on it: https://developer.apple.com/library/archive/documentation/mac/pdf/Operating_System_Utilities/Gestalt_Manager.pdf https://developer.apple.com/library/archive/documentation/ma...
ncmncm 5y ago
Still, since you didn't need to run MacOS apps much, it wasn't really a problem. MacOS couldn't crash the Unix or X subsystems, or anything (else) on them, and nothing else could crash MacOS.