Tupman, a UK-born Salford University engineering electronic graduate, had been Apple’s iPhone and iPod engineering chief for a decade, and a key member in the development of both iOS devices.
According to 9to5mac.com, two sources “confirmed his departure”, with Apple yet to finalise a replacement, believing it will come from within the company.
After spending seven years as lead engineer at oilfield services company Schlumberger, and six years at mobile computer manufacturer Psion, Tupman joined Apple in 2002 and is named in 70 Apple technology patents, which include device interfaces and battery life management.
The 9to5mac website claims that Tupman’s Apple office number has been disconnected, and he has been removed from the company directory.
Last year saw the departure of three other executives, long-time Mac OS X head Bertrand Serlet, Mobile Advertising Vice President Andy Miller and Global Security Vice President John Theriault.