Who is John Ternus, the Apple exec tipped to take over from Tim Cook

• John Ternus may be the frontrunner to become Apple CEO when Tim Cook steps down, Bloomberg reported.
• Ternus is the hardware engineering chief and has worked for Apple since 2001.
• Other names in the frame include chief operating officer Jeff Williams.

and macOS; and retail chief Deirdre O’Brien.

Apple didn’t immediately respond to a request for comment from Business Insider, sent outside normal working hours.