I don't believe Apple relied on any third party unix as they had their own flavor, intact Apple once sold at least on of their SC drives, one of the 20, 40, 80, or 160 drives with A/UX preinstalled. I have a few things that I really would like to explore knowledge wise, to sort of resurface some of the old knowledge that is out there regarding all this by now ancient tech. Yes I do have a post on some of the old network cards, to be fair it's more or less text taken from Apple's own literature and I popped it on nichrome.us.
Not to throw this discussion off the rails but nichrome's main purpose/goal is to use the waybackmachine downloader to scrape old Apple and 3rd part sites that offered solutions for Macs and Newtons etc and download as many files as I can, the hope is that I can perhaps pull some software that might be thought to be lost.
Here is a one liner example. I don't do it this way because it is overwhelming to do one at a time, instead I use a bash script and feed the downloader a list of sites to scrape. There is some post processing such as removing duplicates and consolidating everything to a collection. I have been uploading to the Macintosh Garden but I don't know if the material is being moved to the site itself but it's accessible from nichrome.us
So the line below will pull all those file types that are listed between pipes.
wayback_machine_downloader -s -d expressit.com_IA -c3 --only "/\.(hqx|sit|bin|tar|z|gz|uue|dmg|dd|pkg)$/i" expressit.com
Sadly I recently purchased a RAID and I was very careless because I accidentally deleted the downloads I had done since the start but over a few days it can be reconstructed through the bash script. No big deal but goes to show how nice a backup would have been — one of the reasons for the RAID.
—Alex