That's rubbish. Apple were instrumental in PPC. They had actual paid-for employees at an ARM-style chip development team, IIRC, called the Somerset Design Team, which was joint IBM, Apple and Motorola. This continued until the PPC alliance essentially broke up, with IBM concentrating on embedded G3s and their Power server chips and Motorola on embedded G4s. The finally provides a desktop-suitable gap in the middle of it all.