When a new version of the Mac operating system shipped in July 1997, weeks after he had helped oust Amelio,
Jobs did not allow the clone makers to upgrade to it.
The head of Power Computing, Stephen "King" Kahng, organized pro-cloning protests when Jobs appeared at Boston Macworld that August
and publicly warned that the Macintosh OS would die if Jobs declined to keep licensing it out.
"If the platform goes closed, it is over," Kahng said. "Total destruction. Closed is the kiss of death."
Jobs disagreed. He telephoned Ed Woolard to say he was getting Apple out of the licensing business.
The board acquiesced, and in September he reached a deal
to pay Power Computing $100 million to relinquish its license and give Apple access to its database of customers.
He soon terminated the licenses of the other cloners as well.
"It was the dumbest thing in the world to let companies making crappier hardware use our operating system and cut into our sales," he later said.