Unfortunately, Microsoft abandoned Flight Simulator for the Mac, way back in Mac OS6.x. Currently there is no version for a Mac. If you want really want Flight Simulator, there is just one option “Boot Camp”. Oct 19, 2016 Executive summary is that my /LibraryApplications Support folder needed to be cleaned up by removing the 'iPhone Simulator' folder. Then all simulators worked, again. My method below to figure this out is to make sure it was not because of one version of OS X or one version of Xcode, since always there are many. TL;DR to follow.
Dyld Mach-o But Built For Simulator (not Macos)
After installing macOS Mojave or later, you might see an alert that says audio input isn't accessible when trying to record. Or you might not hear sound, see waveforms, or see audio meters move when recording. To record audio, allow the app to access audio inputs:
- Close the app you're using to record audio.
- On your Mac, choose Apple menu > System Preferences, click Security & Privacy, then click Privacy.
- Click Microphone.
- Select the checkbox next to an app to allow it to access the built-in microphone on your Mac, an external USB mic, or the inputs on an external audio interface.
- Open the app and try to record audio again.
Mach-o But Built For Simulator (not Macos)
If you're using an external microphone or an external audio interface to record audio and it's still not working, check with the manufacturer of your device for software updates and information on compatibility.
Learn more
Here are some more resources to help with recording audio: