The Apple Style Guide provides editorial guidelines for text in Apple instructional materials, technical documentation, reference information, training programs, and user interfaces. The intent of these guidelines is to help maintain a consistent voice in Apple materials.
Writers, editors, and developers can use this document as a guide to writing style, usage, and Apple product terminology. Writers and editors should thoroughly review the guide to become familiar with the range of issues involved in creating high-quality, readable, and consistent materials. Apple developers and third-party developers should follow these guidelines for user-facing text.
Yes, I did download the PDF for archival in my DEVONthink database.