Intel-based Mac: Startup sequence and error codes, symbols
The following is an overview of the startup sequence, error conditions, and behaviors for all Intel-based Macintosh systems.
Note that some newer Macintosh models only use tones to indicate error conditions. See this article for more information.
|Startup Sequence stage||Event|
|Power On||Boot-ROM/RAM check is initialized|
|kernel||Grey screen with Metallic Apple and spinning gear|
|loginwindow||Login window appears|
|User Environment Setup||The text "Logging in..." appears in login window along with a progress bar. Upon successful login, the Desktop and Dock appear.|
Learn more about trouble shooting on Mac OS X's startup process.