Announcement: Upgrade to macOS Mojave

With features like Dark Mode, Stacks, and four new built-in apps, macOS Mojave helps you get more out of every click. 
Find out how to upgrade to macOS Mojave >

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


Question: fix sound on 2017 27 inch retina iMac

I have a 27-inch iMac with Retina 5K display that had sound problems after I installed Boom 2 from the Apple App store. I wiped the drive and installed High Sierra which did not solve my sound problem. I use iTunes with Crossfade yet the sound varies from song to song, even those that I have purchased from Apples iTunes store.

There is no sound during startup, so I can't reset the PRAM is the SMC. Seems strange that I could on my old iMac.

Can anyone help?


iMac with Retina 5K display, macOS High Sierra (10.13.3), 2 TB fusion drive

Posted on


Mar 4, 2018 8:46 AM in response to Coyote27 In response to Coyote27

Hi Coyote27,

I understand that you installed Boom 2 from the App Store, and then started having audio issues. After erasing and reinstalling macOS, you continue to have various issues with your audio, including no sound at startup. I'm happy to provide some help for this issue.

Check out the troubleshooting in the following article:

Get help if the internal speakers on your Mac don't make sound - Apple Support

Based on what you've already gone through, and what's recommended in that article, I recommend that you follow the steps there to update macOS and contact Apple Support if needed:

Use the latest version of macOS

The first step is to make sure that you're using the latest version of macOS. Back up your important information and then update the software on your Mac.

If you still don’t hear any sound, contact Apple Support.

Thanks for using the Apple Support Communities. Cheers!

Mar 4, 2018 8:46 AM

Reply Helpful
User profile for user: Coyote27

Question: fix sound on 2017 27 inch retina iMac