Secure Storage not working on .NET MAUI Mac Catalyst – Launch failed with RBSRequestErrorDomain Code=5

[Sgudipu]

Description

When attempting to use Secure Storage in a .NET MAUI app targeting Mac Catalyst, the application fails to launch with the following error:
The application cannot be opened for an unexpected reason, error=Error Domain=RBSRequestErrorDomain Code=5 "Launch failed."
UserInfo={NSLocalizedFailureReason=Launch failed.,
NSUnderlyingError=0x122205be0 {Error Domain=NSPOSIXErrorDomain Code=153 "Unknown error: 153"
UserInfo={NSLocalizedDescription=Launchd job spawn failed}}}

Steps to Reproduce

1. Create a new .NET MAUI project.
2. Implement Secure Storage functionality.
3. Add the required entitlements in entitlements.plist

<dict>
	<key>keychain-access-groups</key>
	<array>
		<string>com.companyname.securestoragemaui</string>
	</array>

4. Configure the project for Mac Catalyst.

  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|net8.0-maccatalyst|AnyCPU'">
  <CodesignEntitlements>Platforms\MacCatalyst\Entitlements.plist</CodesignEntitlements>
</PropertyGroup>

5. Run the app in Debug mode. I followed the official documentation for configuring Secure Storage on Mac Catalyst. [https://learn.microsoft.com/en-us/dotnet/maui/mac-catalyst/entitlements?view=net-maui-9.0].

Link to public reproduction project repository

No response

Version with bug

10.0.0-preview.4

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

No response

Affected platforms

macOS

Affected platform versions

MAUI Mac catalyst

Did you find any workaround?

No response

Relevant log output

[jsuarezruiz]

Can you share a small sample where reproduce the issue or paste your Entitlements Configuration?

[Sgudipu]

Hi @jsuarezruiz. Please find the below code I am unable to upload the sample it shows its failing. please find the below code and configuration.

1.Entitlements.plist inside code

`

keychain-access-groups com.companyname.securestoragemaui ` 2. I mentioned in project file like below as per Microsoft documentation. ` Platforms\MacCatalyst\Entitlements.plist ` 3. its code behind code its `private async void Save(object sender, EventArgs e) { string savedToken = SaveToken.Text; if (!string.IsNullOrEmpty(savedToken)) { await SecureStorage.Default.SetAsync("oauth_token", savedToken); SaveToken.Text = string.Empty; await DisplayAlert("SAVED", "Token saved", "Ok"); } else { await DisplayAlert("ERROR", "Please enter the token", "Ok"); } }`

[jfversluis]

A couple of things:

• .NET 8 for .NET MAUI is now officially out of support, if you are using that, please update to .NET 9 and see if it then works
• In the initial report you mention .NET 10 as the version you are using. Whether you are using .NET 9 or 10, in both cases the Condition on the PropertyGroup node to include the Entitlements.plist file is incorrect since it explicitly lists .NET 8.
• I don't think you need to include the Entitlements.plist file like that in your csproj file at all. Just having the file in Platforms/MacCatalyst should be enough

Double-check if your Entitlements.plist actually ends up in your app bundle and that it is configured correctly.

[Sgudipu]

@jfversluis I have created the .Net 9.0 and fallowed the Microsoft document for configure the Entitlements.plist and run the App but still I am getting the same Error but same setup working in IOS only problem with Mac catalyst

Entitlements.plist

If you need any Info please let me know.

[jfversluis]

The $(AppIdentifierPrefix) in your Entitlements.plist seems a bit weird?