MacOS AU compatibility

MacOSX and iOS
1

My plugin in Audio Unit format is compiled on MacOS 14 and runs fine but crashes when opened in MacOS Ventura (13.4). When opened in logic it gives the following error:

image
image276×242 24.9 KB

Also when running auval auval -a, auval crashes immediately with the following output:
zsh: bus error auval -a

When i compile the plugin on a VM with Ventura 13.4.1 the plugin also runs fine. But when compiled on MacOS 14 it immediately crashes when opened in MacOS 13. Is there some kind of backward compatibility thing i should take into account?

I also tried debugging with pluginval on the VM with Ventura which crashed here (juce_AudioUnitPluginFormat.mm):

static void createAudioUnit (VersionedAudioComponent versionedComponent, AudioUnitCreationCallback callback)
{
    if (versionedComponent.isAUv3)
    {
        AudioComponentInstantiate (versionedComponent.audioComponent,
                                   kAudioComponentInstantiation_LoadOutOfProcess,
                                   ^(AudioComponentInstance audioUnit, OSStatus err)
                                   {
                                       callback (audioUnit, err);
                                   });

        return;
    }

    AudioComponentInstance audioUnit;
    auto err = AudioComponentInstanceNew (versionedComponent.audioComponent, &audioUnit);
    callback (err != noErr ? nullptr : audioUnit, err);
}

Where it crashes on line:

auto err = AudioComponentInstanceNew (versionedComponent.audioComponent, &audioUnit);

The thread backtrace is showing me the following output:

* thread #1, name = 'JUCE v8.0.3: Message Thread', queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=2, address=0x10b26abf8)
  * frame #0: 0x0000000198337e28 libobjc.A.dylib`map_images_nolock + 5400
    frame #1: 0x000000019833688c libobjc.A.dylib`map_images + 100
    frame #2: 0x000000019838cb20 dyld`dyld4::RuntimeState::notifyLoad(std::__1::span<dyld4::Loader const*, 18446744073709551615ul> const&) + 656
    frame #3: 0x00000001983b6d4c dyld`dyld4::APIs::dlopen_from(char const*, int, void*) + 1428
    frame #4: 0x00000001987df3e0 CoreFoundation`_CFBundleDlfcnLoadBundle + 192
    frame #5: 0x00000001988549f4 CoreFoundation`_CFBundleLoadExecutableAndReturnError + 328
    frame #6: 0x000000019a3e6d28 AudioToolboxCore`APComponent_FromBundle_Loadable::ResolveFactoryFunction() + 68
    frame #7: 0x000000019a3e5d1c AudioToolboxCore`APComponent::newInstance(unsigned int, bool, void (OpaqueAudioComponentInstance*, int) block_pointer) + 324
    frame #8: 0x000000019a4e9f3c AudioToolboxCore`instantiate(OpaqueAudioComponent*, unsigned int, bool, void (OpaqueAudioComponentInstance*, int) block_pointer) + 428
    frame #9: 0x000000019a4ea45c AudioToolboxCore`__AudioComponentInstanceNew_block_invoke + 120
    frame #10: 0x000000019a35f7f0 AudioToolboxCore`Synchronously + 132
    frame #11: 0x000000019a4ea1e0 AudioToolboxCore`AudioComponentInstanceNew + 248
    frame #12: 0x00000001003f3c4c pluginval`juce::createAudioUnit(versionedComponent=(audioComponent = 0x00000000815db048, isAUv3 = false), callback=juce::AudioUnitCreationCallback @ 0x000000016fdfd568)>) at juce_AudioUnitPluginFormat.mm:520:16

Any tips on debugging this further or what the cause of the error might be?

2

Have you set the deployment target? For example, you can set the deployment target to 10.13:

# This must be set before the project() call
# see: https://cmake.org/cmake/help/latest/variable/CMAKE_OSX_DEPLOYMENT_TARGET.html
set(CMAKE_OSX_DEPLOYMENT_TARGET "10.13" CACHE STRING "Support macOS down to High Sierra")
2 Likes
3

That was it!

I was unaware of this CMake variable. Thanks!