Watch Welcome to Macintosh for Free: How to Stream the Movie Online at 123Movies. . "Welcome to Macintosh" is a documentary that mixes history, criticism and an unapologetic revelry of all things Apple. Whether a long time Mac fanatic or new to computers, Welcome to Macintosh explores the many ways Apple Computer (now Apple, Inc.) has changed the world, from the early days of the Apple-I to the latest the company has to offer.