Apple celebrated 50 years in business in high style, on a Tuesday, at Apple Park in Cupertino, with none other than Sir Paul McCartney performing live in the rainbow bandshell.Apple, Inc. turns 50 today, and on Tuesday night, they had an employee celebration at the center of the company's spaceship doughnut campus in Cupertino, with a private concert by Paul McCartney. As ABC 7 reports, McCartney sang a bunch of his and the Beatles' hits, including "Hey Jude," "Live and Let Die," "Help!", "Love Me Do," and "Ob-La-Di, Ob-La-Da," and the station had a helicopter hovering over showing the crowd of employees and  lined up to get inside Apple Park before the big show — and, reportedly, capacity dictated that they could not bring a guest.There's no word on how good the catering was, but below you can see a decent clip of the concert, beginning with "Let It Be." As for the 50th anniversary employee swag bag, it was kinda chintzy? Apple CEO Tim Cook put out a memo to employees Wednesday, the abridged text of which can be seen below, via MacWorld.Today officially marks Apple’s 50th anniversary. And as we’ve celebrated that milestone this month, l’ve been reflecting on some powerful words from Steve.“When you grow up, you tend to get told that the world is the way it is,” he said. “But life can be much broader once you discover one simple fact: everything around you that you call life was made up by people that were no smarter than you. You can change it, you can influence it, you can build your own things that other people can use. Once you learn that, you’ll never be the same again.”This is the ethos that brought Apple into the world in 1976 – and for fifty years, it’s what has drawn the smartest, most passionate, most creative and most committed people to this company....Fifty years ago, there was a single computer prototype in a garage. Today, there are 2.5 billion active Apple devices in the hands of people in every corner of the earth — helping them create, communicate, learn and connect in ways that would have seemed unimaginable then.It’s impossible to fully quantify the profound impact this company and its people have had on the world. And it’s a truly special thing to do what we do every day, knowing that our work is squarely focused on empowering people and enriching their lives....Thank you for everything and here’s to the next fifty years.Top image: Photo via appleworldturkish/Instagram ...read more read less