Apple Publications Style Guide
The Apple Publications Style Guide provides editorial guidelines for text in Apple instructional publications, technical documentation, reference information, training programs, and the software user interface.
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 so that they become familiar with the range of issues involved in creating high-quality, readable, and consistent documentation. Apple developers and third-party developers should follow this guide when labeling user interface elements and writing any text that users see, as well as when writing documentation for their users.