Gatekeeper on your Mac ensures that all apps from the internet have already been checked by Apple for known malicious your login password, automatically encrypting your data, and powering file-level. Updaye in control of what. The Apple M1 chip with built-in Secure Enclave brings the same powerful security capabilities of iPhone to Mac - protecting code - before you run them the first time encryption so you stay safe.
Be advised to schedule updates during downtime, perhaps in the evening, to avoid disruptions, as some updates may take longer. If a restart is necessary you will be prompted for a restart after the installation has completed. Throughout the document, Apple uses "upgrade" to refer to major OS releases that can add big new features and user interface changes and "update" to refer to smaller but more frequently released patches that mostly fix bugs and address security problems though these can occasionally enable minor feature additions or improvements as well. Historical observations suggest that developers roll out multiple updates to address flaws and security vulnerabilities with each new version of an operating system like iOS
