As usual with its annual release cycle, the installer will offer users the chance to perform an in-place upgrade, safely retaining their documents and data while the underlying OS gets a tune-up. In approximately 3-4 months, Apple will make macOS 10.15 (aka Catalina) available to the masses for download on the Mac App Store. Hiring kit: iOS developer (TechRepublic Premium).
2021 event: What you need to know (free PDF)
