Macintosh startup

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The classic Macintosh startup sequence includes hardware tests which may trigger the startup chimes, Happy Mac, Sad Mac, and Chimes of Death.

All Macs made from 2016 to 2020 have the startup chimes disabled by default,^[1] however it would later be re-enabled on those Macs running macOS Big Sur or later; this can be disabled by the user within System Preferences (Big Sur up to Monterey) or System Settings (Ventura and later).^[2]