I wrote a VT100 emulator in PostScript for NeWS in 1987! I worked for a company called Wedge Computer (ha ha!), who ported NeWS to the Mac II running A/UX, which needed a way to connect to Unix servers from NeWS without running a terminal emulator client remotely. It could passed vttest!
https://donhopkins.com/home/archive/NeWS/tnterm.ps
https://en.wikipedia.org/wiki/NeWS
Two versions of NeWS on Mac II Make Debut
https://books.google.nl/books?id=Cj8EAAAAMBAJ&pg=PA31&lpg=PA...
Yep, Unix ran on Macs in 1988!