How do you start up an Intel-based Mac in safe mode?

Starting up an Intel-based Mac in safe mode is achieved by pressing and holding the Shift key during the startup process. This method initiates a boot sequence that loads only the essential components of the operating system while preventing unnecessary software from loading. Safe mode is particularly useful for troubleshooting issues, as it allows users to diagnose problems without interference from third-party applications or extensions that may cause instability.

In safe mode, the system performs a directory check of the startup disk and loads only basic system components, which can help isolate issues related to software or user configurations. This makes it an essential tool for Mac users experiencing performance issues or crashes, helping them to get their devices back to a stable operating condition.