Which came first, the Macintosh or YouTube?

the Macintosh came first, by 21 years. Apple launched the first Macintosh, two days after the Super Bowl advert.

Side by side

the Macintosh

The Macintosh launched in January 1984 with a graphical interface and a mouse, and beat Windows to market by almost two years. Neither invented the idea — Xerox PARC had built the Alto in 1973, and both Apple and Microsoft were working from what they had seen there. Mac OS X, the ancestor of today's macOS, arrived much later in 2001 and is Unix underneath.

YouTube

The youtube.com domain was registered on Valentine's Day 2005, the first video — "Me at the zoo", 19 seconds of a co-founder at San Diego Zoo — was uploaded on 23 April, and the site opened publicly in the winter. Google bought it in November 2006 for $1.65 billion, about twenty months after the domain was registered. It is younger than Facebook by a year and older than Twitter by one.