The Bitcoin whitepaper is hidden in every modern copy of macOS.
View it by opening Terminal and write this before hitting enter:
open /System/Library/Image Capture/Devices/VirtualScanner.app/Contents/Resources/simpledoc.pdf
Bitcoin whitepaper is hidden in macOS
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How to Connect a Windows PC to your Mac
If you connect a Windows PC to your Mac, it is illustrated with the blue screen of death: To see it you can open Terminal and type in this before hitting enter: open /System/Library/CoreServices/CoreTypes.
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6 Hidden Easter Eggs in macOS
Fun macOS easter eggs including Bitcoin whitepaper, Think Different text, Clarus the Dogcow, and hidden Terminal commands