[wool_gather]

Apple used to have a lot of pretty good (not perfect, but pretty good) conceptual/architectural documentation. Most of it has sadly been sunset, and is hard to find, even though it's still largely applicable. And it hasn't been replaced -- hopefully that's just "hasn't been replaced yet".

[Ididntdothis]

Apple documentation in the 90s was a piece of beauty. Microsoft's was pretty good too back then with MSDN Library CDs.

[cschep]

This is so true and so sad. It was so good!