While the IBM Personal Computer incorporated the designation in its model name, the term originally described personal computers of any brand.
In some contexts, "PC" is used to contrast with "Mac", an Apple Macintosh computer.[5][6][7][8] Since none of these Apple products were mainframes or time-sharing systems, they were all "personal computers" and not "PC" (brand) computers.
https://en.wikipedia.org/wiki/Personal_computer