Apple CEO Tim Cook had to deal with an "insurrection" when it was announced that Bob Mansfield -- formerly Apple's senior VP for hardware engineering -- was retiring, three Bloomberg sources say. The people claim that after the announcement, several senior engineers on Mansfield's team complained to Cook; they argued that Mansfield's replacement, Dan Riccio, was unprepared for the importance of the job. To get Mansfield to return to the company, Cook reportedly offered him "an exorbitant package of cash and stock worth around $2 million a month."