You can also attempt running an Apple Diagnostics for accurate results. Rebooting your Mac may resolve the issue otherwise, replacing the Random Access Memory (RAM) might be better. The proper fix is known after troubleshooting. Your device attempts to resolve this issue and will likely startup after completion. The will arise if the firmware fails to install correctly. You may encounter the MacBook beeping 3 times alternating between long and short sounds. Thus, the failure of the device to complete an integrity check triggers the beeps. This component could be damaged or out of place. A 3-beep sound within a 5-second interval proves a RAM-related issue within your MacBook Air or MacBook Pro. There are two kinds of beeps you may hear. Identifying the kind of beeps is the first step in resolving this problem. Is your MacBook beeping 3 times and won’t turn on? it signals that you might be facing hardware-related issues. If you didn't recently install RAM and you are getting the 3 successive tone beeps it could be your RAM is bad and your computer needs service.If you buy through affiliate links, we may earn a commission at no extra cost to you. It will restart back into OS X when recovery is complete.' Do not disturb the machine while the ROM recovery is taking place. Newer computers automatically recover from a corrupted ROM when this occurs, a progress bar appears on the screen during ROM recovery mode. Search Apple Downloads for the right CD image for your computer. If you need to restore the EFI ROM on certain Mac computers produced before 2008, you'll need to use a Firmware Restoration CD to restore the EFI ROM. If you recently added or replaced memory, make sure that it's properly installed.ģ successive tones, a 5 second pause (repeating): This indicates RAM does not pass a data integrity check.ġ long tone while holding down the power button: Indicates an EFI ROM update is in progress on a computer manufactured before 2012.ģ long tones, 3 short tones, 3 long tones: Indicates EFI ROM corruption is detected and the computer is in EFI ROM recovery mode.

Your Mac isn't detecting any memory (RAM).

About Mac computer startup tones - (The below is an integrated version of the new and older version of this document.)ġ tone, repeating every 5 seconds: This indicates no RAM is installed.

Macbook pro 3 beeps in a row