Tough to make that case from the same historical perspective and era the author has used. In today's environment, sure, Apple's OS can be a Unix-like workstatio

Tough to make that case from the same historical perspective and era the author has used. In today's environment, sure, Apple's OS can be a Unix-like workstation, but back in the day... In my own experience, rarely was a Macintosh even considered for Unix workstation replacement, although in the early OS X era we once brought in a brand new G3 purely for testing of portability but it was not a success for our needs so it was eventually used only for light office-related workloads. We never got around to trying a NeXT workstation. EDITED to add: IMHO only a lot of setup work i.e. Homebrew can make a modern macOS machine comparable to a classic Unix-like workstation for traditional UNIX capabilities.