There are different beeps for different issues.

This could be several things, fortunately the device should actually be helping you to diagnose the issue. Although the PRAM works differently than the SMC, it can, depending on your Mac model, store a few bits of information that the SMC uses. If the SMC reset didn't fix your problems, you can try combining it with a PRAM reset. Now that you have reset the SMC on your Mac, it should be back to operating as you expect. Press and hold this button for 10 seconds.Ĩ.Start your Mac by pressing the power button. If you have a Mac Pro that isn't responding to the normal SMC reset as described above, you can force a manual SMC reset by using the SMC reset button located on the Mac Pro's motherboard.Ĥ.Just below the Drive 4 sled and adjacent to the top PCI-e slot is a small button labeled SMC. Release all keys at the same time.Ĥ.Press the power button to start your Mac.ģ.Press and hold the Mac's power button for 15 seconds.ħ.Start your Mac by pressing the power button. Mac portables with non-user-removable batteries (MacBook Air and some late 2009 MacBook Pro models):Ģ.Connect the MagSafe power adapter to your Mac and to a power outlet.ģ.On the built-in keyboard (this will not work from an external keyboard), simultaneously press and hold the left shift, control, and option keys while you press the power button. Mac portables with user-removable batteries (MacBook and most MacBook Pros):Ģ.Disconnect your Mac portable from its MagSafe connector.Ĥ.Press and hold the power button for at least 5 seconds. If your Mac fails to shut down, try pressing and holding the power button until the Mac shuts down, which usually takes 10 seconds or so. All SMC reset instructions require shutting down your Mac first.

The method for resetting your Mac's SMC depends on the type of Mac you have. First step would be to Reset Your Mac's SMC

Macbook pro 3 beeps no video