In a rare tweet, former Apple executive Scott Forstall has celebrated 20 years of Mac OS X, the operating system he helped create.
Late on March 24, 2021, the 20th anniversary of Mac OS X’s official public release, former senior vice president Scott Forstall tweeted a little Apple history.
Happy 20th Birthday Mac OS X! I still remember when we named you. In a small room in IL1. When Steve slashed a large X on the wall and smiled. Look at how far you’ve come from a young Cheetah.
— Scott Forstall (@forstall) March 24, 2021
IL1 is a room in Infinite Loop, Apple’s campus at the time. When OS X was being developed, he was in charge of its user interface, the element that became known as Aqua.