At the centre of the opening was a rainbow stage dreamed up by Jony Ive -- Apple's head of design.
"Apple yesterday held its formal opening of Apple Park, including a concert on the rainbow stage at the centre of the campus. Lady Gaga performed at the event, with Apple Park employees taking to Twitter and Instagram to share photos and videos," the 9to5Mac reported on Saturday.
"We came together today, in the home you imagined for us, and celebrated your spirit. We love you, Steve," Cook tweeted.
The iPhone maker changed its official address from One Infinite Loop to One Apple Park over a year ago, but it reportedly waited to hold a celebration of the formal opening of its new headquarters until this weekend.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)