Yes. P.C. Is a personal Computer. A Mac is a personal computer.
People have deemed it necessary to abbreviate computers running a particular operating system to a short 2 or 3 letter abbreviation and Windows is now PC and Mac isn't. I'll take a totally random guess here as to why. PC is commonly used because it's held over from computers that follow the IBM PC architecture vs Macs which until a couple of years ago used PowerPC. When the abbreviation came into common usage, nearly every desktop computer that was running on IBM PC like hardware was also running Windows because Macs were running on PowerPC.
We
could say Apple's advertising board is wrong, everyone who PC CD or DVD on their games is wrong because they don't run on Macs, everyone in the world is wrong
except you. But we don't have to because convention overrules.