Steps to fix Mac BIOS beeps

September 10, 2020 by Archie Steele


If your PC displays a "Mac BIOS beeping" error, see these troubleshooting tips.

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Mac beep indicates a problem with RAM. Have you recently updated? Shut down your Mac, hold Command + Option + P + R and turn it back on. Release the buttons when you hear the startup tone a second time. You can also insert the OS X installation DVD, restart C and open Disk Utility from the Utilities menu.



mac bios beeps

Here's a tip from Apple's website that mentions exactly what you're seeing: "3 long beeps, roughly three short beeps, three long positive beeps." I couldn't put Apple on "3 easy beeps, 3 huge long beeps, 3 fast beeps." These several tone combinations are clearly not the same overall.

How do I get my Mac to stop beeping?

  1. Turn off your computer.
  2. Find the following keys on your keyboard: Command, Option, P, and R.
  3. Turn on your computer.
  4. Hold Command-Option-P-R.
  5. Hold the buttons until the computer restarts and you hear the startup beep a second time.
  6. Release the buttons.

Mac computers may want to play multiple tones when properly started. Your Mac should make a unique warm sound when it starts up. If you hear a different sound, it probably indicates a problem with your computer.

What do 3 beeps mean?

Three beeps that repeat after a pause and appear when the computer is turned on indicate a problem with the system memory. The beeps will continue until the computer is turned off, then play again after turning on if the problem is not resolved.

1 large beep when the Force button is pressed: Indicates that a pre-2012 computer system has had significant improvements in EFI ROM.

3 long beeps, many short beeps, much longer beeps: indicates that EFI ROM data corruption was detected, but the computer was always in EFI ROM recovery mode.

May 2021 Update:

We now suggest using this software program for your issue. Also, Reimage repairs typical computer system errors, defends you from file loss, malicious software, computer system failures and optimizes your Pc for maximum performance. You can fix your Pc challenges swiftly and prevent others from happening by using this software:

  • Step 1 : Download and install Computer Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista - Microsoft Certified).
  • Step 2 : Click on “Begin Scan” to uncover Pc registry problems that may be causing Pc difficulties.
  • Step 3 : Click “Repair All” to fix all errors.


If anyone needs to restore an EFi ROM on 2008 certified Mac Macs, you'll want to use a recovery CD to actually restore the EFI ROM. New workswhose tables will automatically recover from the damaged ROM. When this happens, a progress club appears on a gray background. Do not disturb the entire computer while the specific ROM recovery is complete. When you restart, OS X will reboot. For more information on EFI ROM, see EFI - SMC Firmware Versions for Intel Mac Computers. "



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