The IIc used a 65C02 Motorola chip. The Apple II used the 6502. And the Mac used a 68000 Motorola. I used to have the microprogramming specs for the 68000, although I never had a Mac. And I still have the machine language book for the 65C02. Even wrote a few ML programs for that IIc.
Motorolans from that era still speculate on “what might have been” if they had done a sales job on these couple of California geeks putting together a little computer for personal use: the Apple.
But those geeks were little more than faces in a large crowd of early techies, and the most lucrative potential customers were the ones with the obvious big pockets: the auto companies. So, that was the main prize that Motorola went after; as a result, they were for many years the prime supplier of MPU/MCUs to the automakers.
Those two geeks, Jobs and Wozniak, chose the 6502 chip,which was manufactured by a company called MOS Technology, as a direct competitor to Motorola with its 6800/01 series. In fact, its chief designer was Chuck Peddle, who had walked out of Motorola after helping design the 6800 with its plans under his arm. Motorola later won a settlement against MOS Technology for misappropriation of trade secrets.
Later on, when it came time for the Lisa and the MAC, Jobs realized he needed more horsepower than most 8-bit chips could provide (with the possible exception of the Motorola 6809, the chip chosen for the Tandy Color Computer). So Motorola was able to sell him on the 68000, which had 16-bit data bus and 24-bit address bus (expandable to 32 bits). The regularity of the 680x0’s addressing scheme and also its instruction set won the day for Apple for several years, until the adoption of the PowerPC, which was a joint effort of Apple, Motorola, and IBM.
The 8086 was an upgrade to the original strictly 8-bit 8080 design. It utilized various clever tricks to extend its capabilities into the 16-bit domain; but these tricks left the architecture clunky, and with significant limitations.
However, the IBM PC and its clones, using the 8088 and 8086 were astounding successes. Along with the from high volume sales of RAM and other support chips, Intel realized unprecedented revenues and profits. They plowed these into design of ever-faster versions of the 8088, and also significant architectural upgrades resulting in 3 GHz Pentiums and their descendants.
Even Apple finally decided to go with Pentium-class designs in their most recent computers (not the small portable products, though).
I haven’t kept up with the details of the recent Intel and AMD designs, so I don’t know how much of the 8086 architecture is still present in their MCUs.