"Apple Workgroup Server 95" is a Mac model, not a rebranding of the OS as the author claims. I mention this because, per Apple sales literature[1], the version

"Apple Workgroup Server 95" is a Mac model, not a rebranding of the OS as the author claims. I mention this because, per Apple sales literature[1], the version of A/UX that shipped with that machine was "highly tuned", presumably for the 68040-based Workgroup Server 95 — basically a Quadra 950 — and this may be why he initially had trouble installing what his screenshots suggest was a copy of A/UX 3.0.1 from the Workgroup Server software bundle on an SE/30, which is a 68030 machine with a considerably older architecture. While I'm not at all familiar with A/UX, it's certainly true that, historically, it was not unusual for bundled copies of Mac OS to be at least somewhat model-specific. In other words, when resurrecting older Mac models, use retail OS media when possible. The obvious "impossible" case is when you want to install an OS that shipped before the model in question, as retail media will often lack necessary hardware support that would have been slipstreamed into bundled copies. [1] https://archive.org/details/WorkgroupServer95 https://archive.org/details/WorkgroupServer95