Satoshi Nakamoto's Bitcoin whitepaper can be found in any Mac running macOS Catalina or newer, but no one knows why.
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To discover the file via Finder:

The user needs to navigate to the Macintosh HD System Library Image Capture Devices. Control-click on VirtualScanner.app and Show Package Contents, then open the Contents Resources folder simpledoc.pdf.

Baio reports that the Bitcoin whitepaper is used as a sample document for a device called "Virtual Scanner II." This device is hidden for some users or not installed by default.