Don't disturb your Mac while the ROM recovery takes place. Newer computers automatically recover from a corrupted ROM when this occurs, a progress bar appears on the screen during ROM recovery mode. Three long tones, three short tones, three long tones: EFI ROM corruption is detected, and your Mac is in EFI ROM recovery mode.This applies to Mac computers from before 2012. One long tone while you hold down the power button: An EFI ROM update is in progress.If the issue continues, contact Apple Support. If you recently replaced or upgraded your computer's RAM, check to see if it was installed properly. Three successive tones, then a five-second pause (repeating): RAM doesn't pass a data integrity check.One tone, repeating every five seconds: No RAM is installed.Release the keys.If there's an issue with your Mac, it might make one of these tones when it starts up: Hold the keys down until the computer restarts and you hear the startup sound for the second time.Ħ. Press and hold the Command-Option-P-R keys.ĥ. You will need to hold these keys down simultaneously in step 4.ģ. Locate the following keys on the keyboard: Command, Option, P, and R. Hold these keys and the power button for 10 seconds.ģ If you have a MacBook Pro with Touch ID, the Touch ID button is also the power button.ĥ Press the power button again to turn on your Mac. How to fix MacBook beeping 3 times Try resetting the SMC Ģ After your Mac shuts down, press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. If the problem persists, visit an Apple professional immediately or contact Apple Support directly. You may have recently replaced or just upgraded the RAM memory on your MacBook Air or MacBook Pro computer and it was not installed properly. If your MacBook Air or MacBook Pro computer is broadcasting 3 successive beeps at intervals of approximately five seconds, it means that RAM memory did not pass the data integrity check. The beeping indicates that there is an issue with your notebook’s RAM.
Why MacBook beeping 3 times and won’t startup? Why MacBook beeping 3 times and won’t startup?.
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