The freeze is said to have been implemented after Apple executives became "unhappy with the direction and progress" on the project, as described in progress review conducted by Apple design chief Jony Ive. 

It was reported that over 1,000 employees were working on Apple's 'Project Titan'. The agressive hiring, during which Apple was 'stealing' brilliant engineers from Tesla, made quite an impact and was even believed to have threatened Elon Musk's company and its future technological advancements.

A couple of days after Steve Zadesky, a longtime leading Apple engineer, who was initially put in charge of Project Titan, left Apple for "personal reasons", news emerged that the hiring was put on freeze, so some are led to believe his departure has something to do with it.

As it seems, Apple will most likely fail to move on with its plan, which sees the company's first electric car driving on the streets by 2019. According to the ''word on the street'', Apple is facing so many problems developing their project that they are seriously considering creating a partnership with one of the established car manufacturers. Supposedly, BMW, but nothing has been officially confirmed yet.