Running Xcode 12.0 simulator causing cracking speaker sound (MacBook Pro 2020 13')

So far I have tried the Kill coreaudiod fix from the Developer Forums and it works! https://developer.apple.com/forums/thread/667246

Solution: 

1. Open 'Activity Monitor' (Use spotlight or launchpad).
2. Search 'coreaudiod' and double click it.
3. Quit the 'coreaudiod'.
4. It will work.

Credit should go to:

Munon

https://developer.apple.com/forums/profile/Munon

I have installed https://github.com/ExistentialAudio/BlackHole and made in simulator Simulator IO > Audio output > Blackhole 2 ch. No more sounds from simulator and no distortion. Other system sounds work just fine.

I am experiencing the same problem on a MacBook Pro 16" 2019 running 10.15.6 with Xcode 12.0.

The problem occurs when running the simulator or previewing SwiftUI interfaces.

All sound is affected. (Videos, system sounds, video conferences, etc.)

The sound is very crackly making speech almost unintelligible.

I am having the same issue too. Specs are: MacBook Pro (16-inch, 2019), macOS Catalina, 10.15.6

Created a new project in Xcode version 12.0, chose IOS app, and SwiftUI. After running simulator, my on-going music got distorted; Cracking and loud noise!

Please have it addressed very soon. This is annoying

Running macOS 10.15.7 and Xcode 12.0.1 seems to have mostly addressed the problem. Out of the last 5 times I have used Xcode, audio was unaffected 4 times. The 1 time it was affected, I was able to quit the simulator and start it again and the audio problem was cured.

I think there is a way to solve this in the quickest way: killing the simulator and audio process from the terminal

```

xcrun simctl shutdown all

```

and

```

sudo killall coreaudiod

```

Still a workaround but at least I don't need to restart my mac.

I've the same problem, you can fix it by switching the simulator audio output to other (not your main output)

Problem seems intermittent. Some days I experience it, some days I don't. I'm running the latest version of Catalina and Xcode.

When the problem occurs, closing Simulator and Xcode and reopening sometimes resolves the problem.

Don't think so ....

I had this problem two months ago with my old MacBook Pro 13" 2017...

I went to the Apple store several times and they changed the logic board twice ...

As the bug was not from hardware it came back ... they finally changed my Mac with a 2020 MacBook Pro 13" ...

I had again this sound problem yesterday and I finally realised, in fact it comes from the Simulator ... XD

Hi, everybody! There may be a solution you want here. This problem has been bothering me before. Until today, when I tried to test with Airpods Pro, it still made a popping sound, not only that, the sound quality became very poor. It reminds me of the iPhone’s sound quality when it’s screen recording. This inspired me. Maybe we got the wrong idea, not to set the output, but the input. Try to switch between different input device, hope it work. Good luck!!!

I am having the same issue, I was so excited to get on with learning iOS dev, I got an all new Macbook Pro 16 for this and my first issue is this, I don't even start to do anything with the app yet. I thought some body dropped water onto my MBP without me knowing it then I found this! This is real bad experience!

So I have had 10 days of use with BlackHole 2ch.

Setting your Simulator Audio output under I/O > Audio output has been working pretty well. Not having the speaker issues..

So if you have this issue, give it a try. The Blackhole installer is referred to in this discussion further up.

This is embarrassing - not sure how a £3000 laptop is unable to play music and run an iOS simulator. I have this issue on my MBP 16in 2020 (i7, 32GB ram), as well as on my M1 Mac Mini and my 15" 2016 MBP so this is not limited to one device (or architecture). The Blackhole app is a workaround, and I am very grateful to the person who posted it, but Apple need to get on top of issues like this and actually fix them - there have just been too many issues with really glaring bugs recently in both iOS and macOS. Please sort it out Apple - I think it is reasonable to expect a premium experience from a premium device, and this is simply shoddy.

I've been having the same issue on my MacBook 2020, 13". It's impossible to listen to music or watch a tutorial while using Xcode. The audio starts to crack and lag making it distracting. My 2017 MacBook Pro never had that issue and I can hardly call this a MacBook Pro if it can't handle what my older MacBook Pro could. I really hope there will be a fix to this, because I'm starting to think it's not a software issue.

I am just learning Swift, but I have been using the "iPod touch (7th Generation)" simulator the whole time I have been learning and never had this problem. However, today I tried to switch to the "iPhone 12" and "iPhone 11" simulators and the moment I ran one of those simulators my music started crackling.

I guess if you can get away with using the "iPod touch (7th Generation)" simulator for the project that you are working on, that could be used as a workaround for now.

I am using MacOS BigSur version 11.4 and XCode version 12.5 (12E262)