Unable to run the "QML Recorder Example" demo on Mac

[SGaist]

Hi and welcome to devnet,

Did you get a request to allow the use of the microphone ?
Usually you would need to add an entry to your application .plist file that explains why your users shall grant that privilege.

[robertwilliamallen]

Hi @SGaist , I was not prompted to allow microphone access. I also don't see a .plist file in the directory. I am able to run the widgets "Camera Example" and that one does prompt for microphone and does include a .plist file.

[SGaist]

Then for the test, I would grab the .plist from that example and copy it to the app bundle of the other one.

[robertwilliamallen]

I don't think that will work. I'm noticing with the "Camera Example" it has a .pro file which I believe is coming from qmake. While the "QML Recorder Example" has a CMakeLists.txt file, so it was built with CMake. So, I don't think I can add the "shared" folder to a CMake project. Does that make sense?

[SGaist]

MACOSX_BUNDLE_INFO_PLIST but I would copy and adapt the other plist file to match the application.

[robertwilliamallen]

Okay, I added this to the CMake config:

And I am referencing a .plist file with this content:

<?xml version="1.0" encoding="UTF-8"?>
<!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>CFBundleInfoDictionaryVersion</key>
        <string>6.0</string>
        <key>CFBundlePackageType</key>
        <string>APPL</string>

        <key>CFBundleName</key>
        <string>${MACOSX_BUNDLE_BUNDLE_NAME}</string>
        <key>CFBundleIdentifier</key>
        <string>${MACOSX_BUNDLE_GUI_IDENTIFIER}</string>
        <key>CFBundleExecutable</key>
        <string>${MACOSX_BUNDLE_EXECUTABLE_NAME}</string>

        <key>CFBundleVersion</key>
        <string>${MACOSX_BUNDLE_BUNDLE_VERSION}</string>
        <key>CFBundleShortVersionString</key>
        <string>${MACOSX_BUNDLE_SHORT_VERSION_STRING}</string>
        <key>CFBundleLongVersionString</key>
        <string>${MACOSX_BUNDLE_LONG_VERSION_STRING}</string>

        <key>LSMinimumSystemVersion</key>
        <string>${CMAKE_OSX_DEPLOYMENT_TARGET}</string>

        <key>CFBundleGetInfoString</key>
        <string>${MACOSX_BUNDLE_INFO_STRING}</string>
        <key>NSHumanReadableCopyright</key>
        <string>${MACOSX_BUNDLE_COPYRIGHT}</string>

        <key>CFBundleIconFile</key>
        <string>${MACOSX_BUNDLE_ICON_FILE}</string>

        <key>CFBundleDevelopmentRegion</key>
        <string>English</string>

        <key>NSCameraUsageDescription</key>
        <string>Qt Multimedia Example</string>
        <key>NSMicrophoneUsageDescription</key>
        <string>Qt Multimedia Example</string>
        <key>com.apple.security.device.audio-input</key>
        <string>Qt Multimedia Example</string>

        <key>NSSupportsAutomaticGraphicsSwitching</key>
        <true/>
</dict>
</plist>

Now when I run in debug mode I am seeing:

2022-08-01 15:14:42.879870-0500 recorder[12848:436078] User has denied access to microphone
2022-08-01 15:14:42.879901-0500 recorder[12848:436078] User has denied access to camera

But I never see any prompts for camera or microphone.

[robertwilliamallen]

My bad, the full .plist content was cut off. Here's the relevant part:

        <key>NSCameraUsageDescription</key>
        <string>Qt Multimedia Example</string>
        <key>NSMicrophoneUsageDescription</key>
        <string>Qt Multimedia Example</string>
        <key>com.apple.security.device.audio-input</key>
        <string>Qt Multimedia Example</string>

[DerReisende]

@robertwilliamallen do you have com.apple.security.device.audio-input entitlement in your binary?

[robertwilliamallen]

@DerReisende I'm new to Qt so I don't know if I do or not. How would I check?

[DerReisende]

@robertwilliamallen macOS got really bad when it comes to code signing and all that entitlement stuff, especially if you use the modern Apple Silicon CPU Macs. I couldn‘t really figure out how to do that stuff without help.
First you should use the Xcode generator for CMake, then use the latest CMake version you can get.
Then you could specify in your CMakeLists.txt something like the following:

set_target_properties(MyApp PROPERTIES    XCODE_ATTRIBUTE_CODE_SIGN_ENTITLEMENTS ${CMAKE_CURRENT_LIST_DIR}/MyApp.entitlements )

You should read the Apple Documentation regarding Hardened Runtime and Entitlements, e.g. here.
You could also create a dummy xcode swift app and look for a tutorial about entitlements and create a proper file in there and copy that to your qt app.

One thing that REALLY helped me a lot getting a working Qt mac app done on my system was the following book I bought: Professional CMake. Chapter 23 „Apple Features“ has been really helpful. The above code snippet is part of the book.

BTW I just saw in your screenshot that you got a SecTaskLoadEntitlement error so I would guess I am not too far of with my entitlements guess.

[robertwilliamallen]

@DerReisende Thanks so much for the help. I will try your suggestions.

[robertwilliamallen]

Well, it looks like if I click "Run in terminal" it runs correctly as per this:
https://bugreports.qt.io/browse/QTCREATORBUG-23880