The Dissolution of macOS Server
Prior to the release of macOS Lion (née OS X Lion), the server portion of the OS was a separately licensed product and, depending on which license you purchased, you either had or didn’t have a client limit for the server services you enabled. Although the server OS was mainly geared towards the Xserve1, it could run on just about any Mac that could run the normal OS. When the time came for Lion to replace Snow Leopard, things changed....