Apple likes to have the last laugh. Over the years, the company has put a variety of Easter eggs — hidden tricks and features, for the uninitiated — in its line of Mac products.

Mac Os Catalina

From clever photos to secret games, Mac developers have found plenty of ways to slip subtle messages into the personal computers. It's a mark of pride and a veritable rite of passage for product creators.

Incomplete downloads in OS X Mountain Lion have a modified date of Jan. 24, 1984 at 9 a.m. the date Steve Jobs demonstrated the very first Macintosh computer. Snake or Pong on your Mac. It is possible to test Ping on your Mac using the Network Utility app. Before 2014 this was located in Applications Utilities, but since Apple launched Mac OS X Yosemite it has been relocated.

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See also: The 50 Greatest Video Game Easter Eggs of All Time

Pong Pong Mac Os Update

When Apple invented its first Mac, the 128K, consumers could find a very special gem hidden inside; once cracked open, users could see the signatures of everyone who worked for the computer division at the time adorning the interior.

Since then, they've upped the ante, slipping in witty references to Steve Jobs and sly jabs at other computer companies. In the gallery above, find just a few Easter eggs that every Mac-lover should know.