This is just an anecdote, but in 1998-1999, the iMacs we bought where I worked were the first desktop systems I worked with that used USB[1]. My PC at the time

This is just an anecdote, but in 1998-1999, the iMacs we bought where I worked were the first desktop systems I worked with that used USB[1]. My PC at the time used PS/2 for the keyboard and mouse, SCSI for external storage, a PC joystick port for game controllers, RS-232 for the first 8-port MIDI interface I ever owned, and the parallel port for my printer. I didn't migrate to mostly-USB until probably five years later, because I had plenty of non-USB hardware that still worked perfectly, and USB 1.x was slow. Mac users didn't really have that option, so I can certainly believe claims that they were one of (if not the) main drivers of USB. [1] ...and, apparently, the first desktop systems that relied exclusively on USB (https://en.wikipedia.org/wiki/Legacy-free_PC https://en.wikipedia.org/wiki/Legacy-free_PC).