No sound out after wake up in Mavericks

Have you ever try to disable "Power Nap" in System Setting?

Well, still not a permanent solution, isn't it? We just want this bug to be fixed. Most of us, I suppose, want to enable 'Power Nap'.

I believe this fixes the problem, but unfortunately in my situation not having power nap is more of an inconvenience than not having sound and having to restart. Thanks for the fix though I'm sure it's going to be a good temp fix for some people who don't need power nap. As a customer though it would really make me happy to see apple respond to or acknowledge this post with 25k views and 150 comments and give us an update on a fix.

Also, I can confirm this is related to power nap and flash videos, I think this problem only happens to me when YouTube is loaded on chrome and the Mac goes into power nap.

Safari has also this issue, not only in Chrome.

I can't imagine that Macs, which are expensive have such a huge problem and Apple doesn't reply in this thread anything. That is sad.

When I bought my rMBP, first what I did was update system to 10.9.1 and I immadietely replied to this post when i saw that bug. In that time not many people have this issue because someone doesn't want to update, but now a lot of people reply in this thread and everyone who have the same problem can realized that it isn't good.

One word, hope.

Mid-09… I don't have PowerNap. It may be a work around for newer models, but it's not the ultimate fix/cause.

I thought 10.9.1 would have fix this issue - I can't believe us Mac users are resorting to workarounds now. I would mind doing it on a Microsoft or Google device but it defeats the purpose of getting an Apple machine if I have to resort to this. This just renders power nap useless for the time being.

Also it is just not restricted to Browsers, there is just no audio from any content even the OS sounds, and Media content on the drive.

Same problem here in a 2013 MBA 13".

I agree with v1ct0r here. Restarting to fix things, or finding ridiculous workarounds defeats the purpose of having a mac.

I'm also a linux user, and I put up with all kinds of crap there, but also because I can usually do something about things and figure out whats wrong by running dmesg and restarting a service or removing/adding some kernel modules or something.

I believe I have a reliable workaround (if not an explanation) for this phenomenon on (at least) the 13" 2013 Haswell MacBook Airs.

In brief: After booting from scratch, the first time (only) that you suspend the Air, make sure there are no headphones plugged in. Simple as that.

When you revive the laptop after you first suspend, the sound will work reliably -- but only if there were no headphones plugged in the first time you suspended it. Strangely, you can then leave the headphones plugged in during subsequent suspends and sound will return reliably.

To test, do a clean reboot, log in, and confirm that you can hear sound. Close the lid without headphones plugged in and reopen the laptop and log in. Confirm that you can still hear sound. Plug in your headphones (or don't) and suspend again, then reopen the computer and log in. Confirm that you can still hear sound. Sound should stick around reliably until you next reboot, upon which you'll need to do the "close without headphones plugged in" operation once to ensure reliable sound.

Contrarily, do a clean reboot, log in, and confirm that you can hear sound. Close the lid with headphones plugged in and reopen the laptop and log in. Confirm that you can not hear sound. From here on out, whether headphones are plugged in or not when you suspend, sound will not work until you reboot the laptop.

These scenarios work 100 percent of the time for me. Of course, if your loss of sound has a different cause, or perhaps if you have some different setting configured (settings that I have not accounted for in my tests) this may not work for you. But it seems pretty reliable to me.

All this said, hey, Apple. Fix it!

I have to unload the kernel plugin, then load it back in and kill coreaudiod

Really Apple? This is what I paid a premium for? Might want to patch this issue...

worked perfectly...

suedo commands brought back the sound but I'm not sure if it would happen again

It maybe this can help you guys too:

https://discussions.apple.com/thread/5478554?answerId=23514960022#23514960022

Enjoy!

I think disabling 'Power Nap' can fix this problem. Also, because of another bug, disabling 'Power Nap' not only fixes this bug, also isn't disabling 'Power Nap' at all.

I am using an Mac mini 2012 and OS X 10.9.1. After I enabled 'Power Nap', my machine turns to no sound after it automatically sleeps and automatically does backup in power nap. So I disable 'Power Nap', and the no sound problem never happens. Further more, since I am using a 2T Time Capsule, I can still hear my Time Capsule's hard disk's start sound when my mac mini is sleeping. Then I open mac mini, I find in the time machine part, it says the last backup time is the time during it was sleeping.

So I guess for now, the best solution is to disable 'Power Nap', as there is a bug, if you enable 'Power Nap', it will be no sound after your machine sleep and do power nap tasks. Also, because of another bug, disable 'Power Nap' will not disable power nap at all, it just fixes the no sound bug and power nap still works.

Also, you may notice that I am using a mac mini, which does not have a battery. So I think things might changes for a Macbook, which has a battery, as this is an issue related to power plan. But at least, it's worth a try and I wish you good luck.

This solution does work on my 11 inch 2013 macbook air when plugged into the power, but if running on battery there is still no sound on wakeup even though the power nap is disabled. Just need a solution when running on battery power now :-)

Does this work for anyone else?

Owen Zhao wrote:

I think disabling 'Power Nap' can fix this problem. Also, because of another bug, disabling 'Power Nap' not only fixes this bug, also isn't disabling 'Power Nap' at all.

I am using an Mac mini 2012 and OS X 10.9.1. After I enabled 'Power Nap', my machine turns to no sound after it automatically sleeps and automatically does backup in power nap. So I disable 'Power Nap', and the no sound problem never happens. Further more, since I am using a 2T Time Capsule, I can still hear my Time Capsule's hard disk's start sound when my mac mini is sleeping. Then I open mac mini, I find in the time machine part, it says the last backup time is the time during it was sleeping.

So I guess for now, the best solution is to disable 'Power Nap', as there is a bug, if you enable 'Power Nap', it will be no sound after your machine sleep and do power nap tasks. Also, because of another bug, disable 'Power Nap' will not disable power nap at all, it just fixes the no sound bug and power nap still works.

Also, you may notice that I am using a mac mini, which does not have a battery. So I think things might changes for a Macbook, which has a battery, as this is an issue related to power plan. But at least, it's worth a try and I wish you good luck.

Finally.. this one worked for me too. Just deleted the 2 files and did a normal reboot.

Thanks all!

"found deleting these files you mentioned (HD->Library->Preferences->Audio -> both .plist files in this folder) resolved my issue. Though as other people had mentioned doing the P+R key reset had wiped their Mac's I skipped this step, I simply rebooted."

worked for me 2. stick with this fix for now since it happens rarely in my case.

mba 13 haswell + maverics

just another sad exaple of what pure moneymaking without passion looks like. use mac os from snow leopard - cant recall anything similar in lion and mt lion when they were relesed... seems with Steve gone, Apple has lost it's soul

no reason to buy apple any more - samsung, asus and the rest are no worse yet cheaper