this could be the most incorrect mac rumors post ever. If you can't hear the drive spinning but you can hear the beep, it means you really shouldn't be using that drive.

If it fixes it, then i am right, otherwise, your hard disk will probably overheat and dieĪnother quick way to rule out this crazy but true post of mine is to pick up your computer while it is sleeping and and making that beep sound and stick it to your ear to listen for the hard drive spinning Recommend restoring to a conventional hard disk to rule this outĪ mechanical 7200 rpm would be okay to try out At this point unless someone else has a better idea I would suggest letting a 'genius' at a Apple store check it out. That being said 3 beeps is definitely an indication of a ram problem and you have made the proper checks. Mac goes to sleep, lowers power to SSHD and the SSHD starts chirping to tell you its not getting enough power. I am assuming those multiple sticks were of the correct ram for your computer. Other then SSHD i Never ever heard of a mac beeping when it is asleep. I have 4 seagate hybrid drives and i am well acquainted with the beeping sound The beeping is a warning from the hard disk that it is not getting enough power.

Macbook pro 3 beeps on s