.NET MAUI cannot find Android emulators on Mac OS 15

Question

.NET MAUI cannot find Android emulators on Mac OS 15

Wei Wen 1,126

I recently updated Mac OS to Sequoia (15). After I opened my .NET MAUI project in VS Code and waited for all checks to finish, I selected ".NET MAUI: Pick Android Device" from Command Palette, but there was nothing for me to choose from. I have created one Android emulator from Android Studio. Choosing Android devices used to work before the Mac OS update.

I have Cisco Secure Client enabled. So I think it may have something to do with that too.

For a Flutter project that I tested, I also couldn't run Android. There the issue was that somehow the adb could not start when APN was enabled. This was shown when running flutter doctor. But if I ran "ADB_MDNS_OPENSCREEN=0 adb start-server" on the command line before I ran flutter, the problem was solved. In .NET MAUI, this does not solve the problem, and there are no error logs.

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2024-10-29T05:55:47.8033333+00:00
What's the detailed VS code version? Did you try to use sdkmanager to install the emulator?

./sdkmanager --install emulator ./sdkmanager --install "system-images;android-33;google_apis;x86_64"

Refer to Build your first .NET MAUI app - .NET MAUI | Microsoft Learn
Wei Wen 1,126 Reputation points

2024-10-30T01:46:10.2533333+00:00

My VS Code version is 1.94.2, .NET MAUI version is 1.4.36. I tried to run command "sdkmanager --install emulator", but it was not successful, and it complained about package.xml file format. package.xml was a file created two years ago and it is in ~/Library/Android/sdk/tools. But if I tried to change it to other name, sdkmanager seemed still able to find it and complain. Not sure why sdkmanager would not use the package.xml file in its own parent level. I will see if there is another way to solve this problem
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2024-10-30T06:11:17.2233333+00:00

Please open Settings, then find MAUI->Configuration->Android sdk Preferred path, and check if the path is correct.
Wei Wen 1,126 Reputation points

2024-10-30T14:13:09.2333333+00:00
I am very sure the paths are correct, and .NET MAUI output shows that:

ANDROID ENVIRONMENT STATUS: 10/30/2024, 9:20:42 AM

Here is the status of your Android development environment:

Required components:

✓ Java SDK - INSTALLED (version '17.0.11')

Path: '/Library/Java/JavaVirtualMachines/zulu-17.jdk/Contents/Home' (JAVA_HOME)

✓ Android SDK - INSTALLED

Path: '/Users/xxx/Library/Android/sdk' (VSCode Settings)

✓ platforms/android-34 - INSTALLED (version '3')

✓ build-tools/34.0.0 - INSTALLED (version '34.0.0')

✓ platform-tools - INSTALLED (version '35.0.2')

✓ cmdline-tools/11.0 - INSTALLED (version '12.0')

Optional components:

✓ Android Virtual Device (AVD) - COMPLETE

AVD Path: '/Users/xxx/.android/avd'

AVD devices - DETECTED ('Pixel6API35')

✓ emulator - INSTALLED (version '35.2.10')

✓ system-images/android-34/google_apis/arm64-v8a - INSTALLED (version '14')

✓ system-images/android-35/google_apis/arm64-v8a - INSTALLED (version '8')

IMPORTANT:

If you are sharing the Android SDK location with Android Studio, the recommended way to install/update the SDK and accept licenses is by using Android Studio.
Wei Wen 1,126 Reputation points

2024-10-30T14:13:50.81+00:00

As you can see, .NET MAUI detected the device, but it just couldn't show it. And I did have the device running.
Wei Wen 1,126 Reputation points

2024-10-30T15:37:10.05+00:00

I think there may be some compatibility issue after I upgrade my Mac OS version. But if I create a new .NET MAUI project, I can find the Android emulator.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2024-10-31T02:16:19.9933333+00:00

But if I create a new .NET MAUI project, I can find the Android emulator.

It means that you just cannot select the emulator on your current project. Please check if the new project is targeted to .NET9. I noticed that you said ".NET MAUI version is 1.4.36.", please double check the MAUI version and the target platforms on your .csproj file.
Wei Wen 1,126 Reputation points

2024-10-31T03:30:37.79+00:00

I think it may have something to do with me specifically setting TargetFrameworks to net8.0-ios when setting iOS' code sign provisioning and entitlements ( I forgot to set condition). But once I fixed that and worked in Android for a while, and then wanted to switch to iOS, I could not find iOS devices. Choices related to Apple are only iOS (Build Only), My Mac, MacCatalyst. Probably have to reopen the project to get iOS simulators
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2024-10-31T06:24:38.7133333+00:00

Could you share the .csproj file with me? Please check if you can choose the target device, you could click on the curly brackets symbol { } in the bottom right corner of Visual Studio Code. Refer to Build your first .NET MAUI app - .NET MAUI | Microsoft Learn
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2024-11-04T01:10:39.43+00:00

It looks like you solved the problem, I converted the comment to an answer, thanks for your sharing.

1 answer

Your answer

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2024-10-29T05:55:47.8033333+00:00

What's the detailed VS code version? Did you try to use sdkmanager to install the emulator?

./sdkmanager --install emulator ./sdkmanager --install "system-images;android-33;google_apis;x86_64"

Refer to Build your first .NET MAUI app - .NET MAUI | Microsoft Learn
Wei Wen 1,126 Reputation points

2024-10-30T01:46:10.2533333+00:00

My VS Code version is 1.94.2, .NET MAUI version is 1.4.36. I tried to run command "sdkmanager --install emulator", but it was not successful, and it complained about package.xml file format. package.xml was a file created two years ago and it is in ~/Library/Android/sdk/tools. But if I tried to change it to other name, sdkmanager seemed still able to find it and complain. Not sure why sdkmanager would not use the package.xml file in its own parent level. I will see if there is another way to solve this problem
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2024-10-30T06:11:17.2233333+00:00

Please open Settings, then find MAUI->Configuration->Android sdk Preferred path, and check if the path is correct.
Wei Wen 1,126 Reputation points

2024-10-30T14:13:09.2333333+00:00

I am very sure the paths are correct, and .NET MAUI output shows that:

ANDROID ENVIRONMENT STATUS: 10/30/2024, 9:20:42 AM

Here is the status of your Android development environment:

Required components:

✓ Java SDK - INSTALLED (version '17.0.11')

Path: '/Library/Java/JavaVirtualMachines/zulu-17.jdk/Contents/Home' (JAVA_HOME)

✓ Android SDK - INSTALLED

Path: '/Users/xxx/Library/Android/sdk' (VSCode Settings)

✓ platforms/android-34 - INSTALLED (version '3')

✓ build-tools/34.0.0 - INSTALLED (version '34.0.0')

✓ platform-tools - INSTALLED (version '35.0.2')

✓ cmdline-tools/11.0 - INSTALLED (version '12.0')

Optional components:

✓ Android Virtual Device (AVD) - COMPLETE

AVD Path: '/Users/xxx/.android/avd'

AVD devices - DETECTED ('Pixel6API35')

✓ emulator - INSTALLED (version '35.2.10')

✓ system-images/android-34/google_apis/arm64-v8a - INSTALLED (version '14')

✓ system-images/android-35/google_apis/arm64-v8a - INSTALLED (version '8')

IMPORTANT:

If you are sharing the Android SDK location with Android Studio, the recommended way to install/update the SDK and accept licenses is by using Android Studio.
Wei Wen 1,126 Reputation points

2024-10-30T14:13:50.81+00:00

As you can see, .NET MAUI detected the device, but it just couldn't show it. And I did have the device running.
Wei Wen 1,126 Reputation points

2024-10-30T15:37:10.05+00:00

I think there may be some compatibility issue after I upgrade my Mac OS version. But if I create a new .NET MAUI project, I can find the Android emulator.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2024-10-31T02:16:19.9933333+00:00

But if I create a new .NET MAUI project, I can find the Android emulator.

It means that you just cannot select the emulator on your current project. Please check if the new project is targeted to .NET9. I noticed that you said ".NET MAUI version is 1.4.36.", please double check the MAUI version and the target platforms on your .csproj file.
Wei Wen 1,126 Reputation points

2024-10-31T03:30:37.79+00:00

I think it may have something to do with me specifically setting TargetFrameworks to net8.0-ios when setting iOS' code sign provisioning and entitlements ( I forgot to set condition). But once I fixed that and worked in Android for a while, and then wanted to switch to iOS, I could not find iOS devices. Choices related to Apple are only iOS (Build Only), My Mac, MacCatalyst. Probably have to reopen the project to get iOS simulators
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2024-10-31T06:24:38.7133333+00:00

Could you share the .csproj file with me? Please check if you can choose the target device, you could click on the curly brackets symbol { } in the bottom right corner of Visual Studio Code. Refer to Build your first .NET MAUI app - .NET MAUI | Microsoft Learn
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2024-11-04T01:10:39.43+00:00

It looks like you solved the problem, I converted the comment to an answer, thanks for your sharing.

Answer 1

The part of my csproj file that caused my Android emulator to not appear is this:
<PropertyGroup>

<PlatformTarget>AnyCPU</PlatformTarget>

<CodesignKey>Apple Development: XXX</CodesignKey>

<CodesignProvision>MauiDemoApp</CodesignProvision>

<CodesignEntitlements>Platforms/iOS/Entitlements.plist</CodesignEntitlements>

</PropertyGroup>

The real problem is in <TargetFrameworks>net8.0-ios</TargetFrameworks>. That invalidated all previously allowed target frameworks. Also some were already set at the start of the csproj. So The above block was changed to this and it solved my problem:
<PropertyGroup Condition="'$(TargetFramework)' == 'net8.0-ios'">

<CodesignKey>Apple Development: XXX</CodesignKey>

<CodesignProvision>MauiDemoApp</CodesignProvision>

<CodesignEntitlements>Platforms/iOS/Entitlements.plist</CodesignEntitlements>

</PropertyGroup>

In addition, I also have to do this at command line:
ADB_MDNS_OPENSCREEN=0 adb start-server

If I don't do this, adb server will not be able to start and the android environment analysis will run forever without been able to output the result which I showed you earlier.

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.NET MAUI cannot find Android emulators on Mac OS 15

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