why does my macbook turned on and off when pushing power button and makes a chime sound?
why does my MacBook turns on and off when pushing the power button and makes a chime sound?
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From the Apple in the menu bar select System Settings > Sound > Play sound on startup. Toggle the switch to the left of it to the OFF position. That will turn off the start up sound.
If you are asking about something else please elaborate with more details.
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