Am aware of the fact, there is a known problem as mentioned in this Apple KB: Mac notebooks with optical drives: Noises from the optical drive link, that is produced when the OS is initializing the optical drive. It seems to be occurring in OS X Yosemite for now, but would like to know if there is any possible fixes for it in the same OS version or upgrading it to OS X El Capitan will fix the problem.

Mine is the MBP 2012(mid-version), with 8 GB RAM and 500 GB SATA HDD. Any help regards to this appreciated!

  • How does it sound like? Like this? youtube.com/watch?v=K0T60yZmiQw – howdytom Jul 4 '16 at 14:09
  • Not this persistent sound! it doesn't last more than 2-3 seconds along with original apple chime! – Inian Jul 4 '16 at 14:13
  • Something like this? youtube.com/watch?v=cIUVbq25uvY – howdytom Jul 4 '16 at 14:15
  • Bingo! exactly the same! I could see it being no harmful in comments of the video! did a search myself, couldn't find then. Thanks a lot. If you could post that as answer, I will handover the bounty to you :) – Inian Jul 4 '16 at 14:22

The sound is totally normal on older MacBook models and it's not a bug. It's from the optical drive looking for a boot up disk.


This is most likely not even your optical drive, but the PSU fans! Just remove the superdrive bay and your problem is solved!

  • Appreciate your time! But can you provide some verifiable resources/links to back-up the answer? – Inian Jul 1 '16 at 7:21
  • @Inian forums.macrumors.com/threads/… – Amorris Jul 1 '16 at 9:20
  • Am pretty sure this ain't the nature of the problem I am facing. I just have a small buzzing/whirling noise and I am sure it is from the optical drive which lasts only for about 2-3 seconds only during at restart or power-on and not any other time. Thanks for your time though. – Inian Jul 1 '16 at 9:26
  • 1
    @Inian Uhh... if the noise is at startup then it is the sound of it turning on. You cannot get rid of it. – Amorris Jul 1 '16 at 18:53

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