Hi, I detect dark mode on macOS like following: NSAppearance *appearance = NSApp.mainWindow.effectiveAppearance; NSString *interface_style = appearance.name; NSAppearanceName basicAppearance = [appearance bestMatchFromAppearancesWithNames:@[ NSAppearanceNameAqua, NSAppearanceNameDarkAqua ]]; if([basicAppearance isEqualToString:NSAppearanceNameDarkAqua]){ theme = "Adwaita:dark"; dark_mode = TRUE; } if([interface_style isEqualToString:NSAppearanceNameDarkAqua]){ theme = "Adwaita:dark"; dark_mode = TRUE; }else if([interface_style isEqualToString:NSAppearanceNameVibrantDark]){ theme = "Adwaita:dark"; dark_mode = TRUE; }else if([interface_style isEqualToString:NSAppearanceNameAccessibilityHighContrastAqua]){ theme = "HighContrast"; }else if([interface_style isEqualToString:NSAppearanceNameAccessibilityHighContrastDarkAqua]){ theme = "HighContrast:dark"; dark_mode = TRUE; }else if([interface_style isEqualToString:NSAppearanceNameAccessibilityHighContrastVibrantDark]){ theme = "HighContrast:dark"; dark_mode = TRUE; } But this doesn't work if my window is in background. As the application window is put into background, it loses dark mode. Howto fix it? regards, Joël

Hi, I encounter problems after updating macOS to Sequoia 15.5 with plugins loaded with dlopen and dlsym. $ file /Applications/com.gsequencer.GSequencer.app/Contents/Plugins/ladspa/cmt.dylib /Applications/com.gsequencer.GSequencer.app/Contents/Plugins/ladspa/cmt.dylib: Mach-O universal binary with 2 architectures: [x86_64:Mach-O 64-bit bundle x86_64] [arm64:Mach-O 64-bit bundle arm64] /Applications/com.gsequencer.GSequencer.app/Contents/Plugins/ladspa/cmt.dylib (for architecture x86_64): Mach-O 64-bit bundle x86_64 /Applications/com.gsequencer.GSequencer.app/Contents/Plugins/ladspa/cmt.dylib (for architecture arm64): Mach-O 64-bit bundle arm64 I am currently investigating what goes wrong. My application runs in a sandboxed environment.

Hi, I am curious about if hyperthreading is enabled/disabled on my macbook pro M1 or M4. Howto figure out? I am using macOS 15.5. Further, I develop a multi-threaded audio sequencer that creates threads per instrument. I use vector operations to increase performance. I recognized lowering synchronization rate from 250 Hz to 60 Hz gives additional performance advantages. Howto programmatically check if Hyperthreading is enabled/disabled and howto enable/disable it programmatically? After some research I found sysctl() and nvram SMTDisable=%01. https://support.apple.com/en-us/101870 Can anyone provide me an Objective C example? regards, Joël

Hi, I build my application bundle by makefile and later using productbuild to create an application installer. This works fine. But as uploading it to apple using Transporter I get these 2 error messages. #01 error message: Asset validation failed (90242) The product archive is invalid. The Info.plist must contain a LSApplicationCategoryType key, whose value is the UTI for a valid category. For more details, see "Submitting your Mac apps to the App Store". (ID: f25a48a4-8e89-4824-9f22-a6bc2fb90193) #02 error message: Asset validation failed (90259) Bad Bundle Executable. You must include a valid CFBundleExecutable key in your bundle's information property list file. (ID: c3d9f35a-5a27-4cc6-bba8-56cf514c3ad9) Here is my Info.plist <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>CFBundleDevelopmentRegion</key> <string>English</string> <key>CFBundleExecutable</key> <string>GSequencer</string> <key>CFBundleGetInfoString</key> <string>6.4.3, Copyright 2005-2024 Joel Kraehemann</string> <key>CFBundleIconFile</key> <string>GSequencer.icns</string> <key>CFBundleIdentifier</key> <string>com.gsequencer.GSequencer</string> <key>CFBundleInfoDictionaryVersion</key> <string>6.0</string> <key>CFBundlePackageType</key> <string>APPL</string> <key>CFBundleShortVersionString</key> <string>6.4.3</string> <key>CFBundleSignature</key> <string>????</string> <key>CFBundleVersion</key> <string>6.4.3</string> <key>NSHumanReadableCopyright</key> <string>Copyright 2005-2024 Joel Kraehemann, GNU General Public License.</string> <key>LSMinimumSystemVersion</key> <string>11.0</string> </dict> </plist> Here are the 2 binaries in MacOS directory: ls -1 gsequencer-macos/build/universal/GSequencer.app/Contents/MacOS/ GSequencer gsequencer_macos_install Please help me to fix. regards, Joël

Hi, I have create a universal app then did this: https://support.apple.com/en-vn/guide/apple-business-essentials/axm20c32e0c6/web But this doesn't produce a working package installer. productbuild --sign "3rd Party Mac Developer Installer: ****" --component /Applications/MyApp.app MyApp-universal.pkg Do I need to create a code signature with codesign, prior to call productbuild? regards, Joël

Hi, I would love to disable app sandbox completely, because my music application requires extended filesystem permissions. Like reading configuration files from $HOME and enabling services through sockets. The UI toolkit I am using endorses IPC mechanism. cheers, Joël

Hi, I am experience crashes with my application after code signing, this didn't happen before. Does OpenGL require special permissions? GSequencer stack-trace gtk4 crash by, Joël

Hi, I just started to develop audio unit hosting support in my application. Offline rendering seems to work except that I hear no output, but why? I suspect with the player goes something wrong. I connect to CoreAudio in a different location in the code. Here are some error messages I faced so far: 2025-08-14 19:42:04.132930+0200 com.gsequencer.GSequencer[34358:18611871] [avae] AVAudioEngineGraph.mm:4668 Can't retrieve source node to play sequence because there is no output node! 2025-08-14 19:42:04.151171+0200 com.gsequencer.GSequencer[34358:18611871] [avae] AVAudioEngineGraph.mm:4668 Can't retrieve source node to play sequence because there is no output node! 2025-08-14 19:43:08.344530+0200 com.gsequencer.GSequencer[34358:18614927] AUAudioUnit.mm:1417 Cannot set maximumFramesToRender while render resources allocated. 2025-08-14 19:43:08.346583+0200 com.gsequencer.GSequencer[34358:18614927] [avae] AVAEInternal.h:104 [AVAudioSequencer.mm:121:-[AVAudioSequencer(AVAudioSequencer_Player) startAndReturnError:]: (impl->Start()): error -10852 ** (<unknown>:34358): WARNING **: 19:43:08.346: error during audio sequencer start - -10852 I have implemented an AVAudioEngine based AudioUnit host. Here I instantiate player and effect: /* audio engine */ audio_engine = [[AVAudioEngine alloc] init]; fx_audio_unit_audio->audio_engine = (gpointer) audio_engine; av_format = (AVAudioFormat *) fx_audio_unit_audio->av_format; /* av audio player node */ av_audio_player_node = [[AVAudioPlayerNode alloc] init]; /* av audio unit */ av_audio_unit_effect = [[AVAudioUnitEffect alloc] initWithAudioComponentDescription:[((AVAudioUnitComponent *) AGS_AUDIO_UNIT_PLUGIN(base_plugin)->component) audioComponentDescription]]; av_audio_unit = (AVAudioUnit *) av_audio_unit_effect; fx_audio_unit_audio->av_audio_unit = av_audio_unit; /* audio sequencer */ av_audio_sequencer = [[AVAudioSequencer alloc] initWithAudioEngine:audio_engine]; fx_audio_unit_audio->av_audio_sequencer = (gpointer) av_audio_sequencer; /* output node */ [[AVAudioOutputNode alloc] init]; /* audio player and audio unit */ [audio_engine attachNode:av_audio_player_node]; [audio_engine attachNode:av_audio_unit]; [audio_engine connect:av_audio_player_node to:av_audio_unit format:av_format]; [audio_engine connect:av_audio_unit to:[audio_engine outputNode] format:av_format]; ns_error = NULL; [audio_engine enableManualRenderingMode:AVAudioEngineManualRenderingModeOffline format:av_format maximumFrameCount:buffer_size error:&ns_error]; if(ns_error != NULL && [ns_error code] != noErr){ g_warning("enable manual rendering mode error - %d", [ns_error code]); } ns_error = NULL; [[av_audio_unit AUAudioUnit] allocateRenderResourcesAndReturnError:&ns_error]; if(ns_error != NULL && [ns_error code] != noErr){ g_warning("Audio Unit allocate render resources returned error - ErrorCode %d", [ns_error code]); } Then I render in a dedicated thread. ns_error = NULL; [audio_engine startAndReturnError:&ns_error]; if(ns_error != NULL && [ns_error code] != noErr){ g_warning("error during audio engine start - %d", [ns_error code]); } [av_audio_sequencer prepareToPlay]; ns_error = NULL; [av_audio_sequencer startAndReturnError:&ns_error]; if(ns_error != NULL && [ns_error code] != noErr){ g_warning("error during audio sequencer start - %d", [ns_error code]); } [av_audio_player_node play]; while(is_running){ /* pre sync */ /* IO buffers */ av_output_buffer = (AVAudioPCMBuffer *) scope_data->av_output_buffer; av_input_buffer = (AVAudioPCMBuffer *) scope_data->av_input_buffer; /* fill input buffer */ /* schedule av input buffer */ frame_position = 0; // (gint64) ((note_offset * absolute_delay) + delay_counter) * buffer_size; av_audio_player_node = (AVAudioPlayerNode *) fx_audio_unit_audio->av_audio_player_node; AVAudioTime *av_audio_time = [[AVAudioTime alloc] initWithHostTime:frame_position sampleTime:frame_position atRate:((double) samplerate)]; [av_audio_player_node scheduleBuffer:av_input_buffer atTime:av_audio_time options:0 completionHandler:nil]; /* render */ ns_error = NULL; status = [audio_engine renderOffline:AGS_FX_AUDIO_UNIT_AUDIO_FIXED_BUFFER_SIZE toBuffer:av_output_buffer error:&ns_error]; if(ns_error != NULL && [ns_error code] != noErr){ g_warning("render offline error - %d", [ns_error code]); } } regards, Joël

Hi, I have just implemented an Audio Unit v3 host. AgsAudioUnitPlugin *audio_unit_plugin; AVAudioUnitComponentManager *audio_unit_component_manager; NSArray<AVAudioUnitComponent *> *av_component_arr; AudioComponentDescription description; guint i, i_stop; if(!AGS_AUDIO_UNIT_MANAGER(audio_unit_manager)){ return; } audio_unit_component_manager = [AVAudioUnitComponentManager sharedAudioUnitComponentManager]; /* effects */ description = (AudioComponentDescription) {0,}; description.componentType = kAudioUnitType_Effect; av_component_arr = [audio_unit_component_manager componentsMatchingDescription:description]; i_stop = [av_component_arr count]; for(i = 0; i < i_stop; i++){ ags_audio_unit_manager_load_component(audio_unit_manager, (gpointer) av_component_arr[i]); } /* instruments */ description = (AudioComponentDescription) {0,}; description.componentType = kAudioUnitType_MusicDevice; av_component_arr = [audio_unit_component_manager componentsMatchingDescription:description]; i_stop = [av_component_arr count]; for(i = 0; i < i_stop; i++){ ags_audio_unit_manager_load_component(audio_unit_manager, (gpointer) av_component_arr[i]); } But this doesn't show me Audio Unit v2 plugins, why? regards, Joël

Hi, I would love to code with the Neural Engine on my macbook pro M1 2020. Is there any low-level API to create my very own work-loads? I am working with audio and MIDI. As well sound synthesis and mixing. Can I use the Neural Engine to offload the CPU? I am especially interested in parallelism using threads. My programming lanuage of choice is ANSI C and Objective C.

Hi, I need to bundle an additional binary along my yet published application. It is a Audio Unit test application. My yet published application implemented Audio Unit plugin support. But upload is always rejected: Validation failed (409) Invalid Provisioning Profile. The provisioning profile included in the bundle com.gsequencer.GSequencer [com.gsequencer.GSequencer.pkg/Payload/com.gsequencer.GSequencer.app] is invalid. [Missing code-signing certificate.] For more information, visit the macOS Developer Portal. (ID: ****) I have followed the instructions here: Embedding a helper tool in a sandboxed app but no luck. Does anyone know whats going on? I use Transporter to upload the application, the embedded.provisioningprofile is copied from Xcode build and code signing is done manually.