All about textClipping and pictClipping files: what they are, and how to access the data within them.
TextKit
Getting the Find feature right for PDF documents is important. With text find already available, the best solution is distinct from that.
More bugs in Calculator and Activity Monitor when printing, dreadful lack of documentation of AppKit, TextKit, and CoreData. No wonder Apple is struggling to sell iPhones in China.
The Eclectic Light Company 