I went searching for PDF docs, because there was a time when Apple had a number of PDFs, guides & books available. Stumbled over https://developer.apple.com/lib

I went searching for PDF docs, because there was a time when Apple had a number of PDFs, guides & books available. Stumbled over https://developer.apple.com/library/archive/technotes/tn2140/tn2140_QuickTimeDevelop7Article.pdf https://developer.apple.com/library/archive/technotes/tn2140... from 1991. This from 1992: https://developer.apple.com/library/archive/documentation/mac/pdf/MacintoshToolboxEssentials.pdf https://developer.apple.com/library/archive/documentation/ma... And this from 1993: https://developer.apple.com/library/archive/documentation/mac/pdf/MoreMacintoshToolbox.pdf https://developer.apple.com/library/archive/documentation/ma... This from 1994: https://developer.apple.com/library/archive/documentation/mac/pdf/ImagingWithQuickDraw.pdf https://developer.apple.com/library/archive/documentation/ma... 2001, on WebObjects: https://developer.apple.com/library/archive/documentation/LegacyTechnologies/WebObjects/WebObjects_5/GettingStartedOnWindows/WOGettingStarted.pdf https://developer.apple.com/library/archive/documentation/Le... and https://developer.apple.com/library/archive/documentation/LegacyTechnologies/WebObjects/WebObjects_5/DirectToWeb/DirectToWeb.pdf https://developer.apple.com/library/archive/documentation/Le... This from 2002: https://developer.apple.com/library/archive/documentation/QuickTime/QT6WhatsNew/qt6_new6.pdf https://developer.apple.com/library/archive/documentation/Qu... The newest I could find was this from 2017 but it was more because of branding/licensing: https://developer.apple.com/wallet/Add-to-Apple-Wallet-Guidelines.pdf https://developer.apple.com/wallet/Add-to-Apple-Wallet-Guide... Ah, this is what I was thinking of for their PDF documentation. Here's an example from 2018: https://developer.apple.com/metal/CoreImageKernelLanguageReference11.pdf https://developer.apple.com/metal/CoreImageKernelLanguageRef... -- it used to be that when you visited a page like https://developer.apple.com/library/archive/documentation/Miscellaneous/Conceptual/MetalProgrammingGuide/Introduction/Introduction.html https://developer.apple.com/library/archive/documentation/Mi... it would have a link to a PDF version of the same guide, most likely auto-generated. It wasn't great, but it served a purpose when what you wanted was a PDF to read or download for offline reference... Also, a unique PDF: https://developer.apple.com/accessories/Accessory-Design-Guidelines.pdf https://developer.apple.com/accessories/Accessory-Design-Gui... (particularly fascinating to page through for the diagrams alone, including iPhone XS, AirPods and Apple Watch Lug Assembly...)