You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

sai fan Author

Level 1

9 points

(MacOs Sierra) Audio issue

I have two audio issues after upgraded to MacOs 10.12 today.

1. The audio balance automatically moved to left channel (It usually at the center)

2. The volume gained up to like 75%

I have adjusted my own but above two issues happens again every time I reboot my mac.

P.s1.Tried to turn off the new Siri function but it doesn't work.

P.s.2. Using external speakers

iMac (Retina 5K, 27-inch, Late 2014), macOS Sierra (10.12)

Posted on Sep 21, 2016 7:51 AM

27 replies

Lanny

Level 6

13,207 points

Nov 27, 2016 1:54 PM in response to geong2468

Just to note my experience with the KEF X300As:

The unbalance issue is only with Sierra, a clean install did not fix it.

All versions of Yosemite, El Capitan, and Sierra have the USB dropout problem, even after clean installs of all three. Using the browser seems to be a common trigger.

Dec 1, 2016 4:50 AM in response to sai fan

Same problem with external speakers after upgraded to 10.12

Apr 1, 2017 2:17 AM in response to alokagrawal

I downloaded Balance Lock and am going to see if it fixes this new problem with KEF X300A's. Does anyone else lose sound after awhile? iTunes doesn't play and websites won't play either.

Apr 10, 2017 5:57 PM in response to Lanny

Hey Lanny,

One last quick question. Would it work if it was plugged into a Thunderbolt display or does it have to be plugged in directly to the MacBook Pro? Thanks again for all of your help.

Lanny

Level 6

13,207 points

Apr 10, 2017 7:01 PM in response to alokagrawal

I would assume that it would, but don't have a Thunderbolt display to try it out. Given that you have a Thunderbolt Display, what happens when you connect the KEFs to one of its USB ports?

Apr 11, 2017 12:05 AM in response to Lanny

Hey Lanny,

My audio drops out consistently every few days or so when connected to the Thunderbolt display. I have to turn the speakers on and off to get it to work again.