@deannat Congratulations on the new job! I've been a tech writer since about 1988 and am kind of amazed there are still jobs out there, given the way most people "hate reading manuals." Scrivener is an excellent tool for creative writers and freelancers, but lacks a lot of the rigor needed for academic or strict tech writing. Lots of XML editors out there if you're going to learn DITA. Framemaker was the rock-solid standard for years but Adobe abandoned it; I think some of the original developers are trying to create a new version for this new age. There is no macOS-specific help system that I know of; most companies have pushed their customer-facing documentation to the web. A good book to have in your tech-writing library is (if you don't already have it) "Every Page is Page One."