Everything indicates that, for the first time, Apple rented an office in the city of San Francisco.
It is true that the company is present in several cities near Cupertino, but until today it had not set foot in San Francisco despite hosting many of its events and also giving the name of the city its new font developed especially for the Apple Watch, iOS 9 and OS X El Capitan.
According to San Francisco Business Times (citing sources in the real estate market), Apple rented two floors of the building located at number 235, on 2nd Street, a space of ~ 7,000m for about 500 employees. The site had been used by CBS Interactive for more than 10 years, but the company had been trying to sublet it for a few months.
It is difficult to know exactly what this space will be used for, but a good guess would be Apple Music. A few years ago, Beats (which was acquired by Apple) rented an office of about 2,400m in the region known as Dogpatch, in San Francisco. This contract expires in 2017, so it is possible that the company will migrate these people in addition to also displacing other people who may currently be working in the vicinity.
(via Cult of Mac)