Sometimes you just have more Macs than monitors – or wish you could free up some space in your network center. But you need a keyboard and mouse to run your Macs, and a monitor to see what you’re doing.
The greatest obstacle to third party mice is the quality of Apple’s mice. Although the early Lisa/Macintosh mouse was a rather chunky affair, it was good enough – and the Mac market was small enough to attract little competition. Also, Apple’s mouse came free with the computer.
There have been alternatives to the Apple keyboard since the Mac Plus era. Macs introduced from 1984 through 1986 were plagued with a particularly thick, clunky keyboard.
CPU-intensive applications really take off with the new Radius Rocket 68040 accelerator for NuBus machines.