flutter-macos-duplicate-camera-plugin

Testing & Quality

Fix Flutter macOS build failure caused by duplicate camera plugins. Use when: (1) macOS build fails with "Ambiguous use of 'CameraMacosPlugin.register(with:)'" error, (2) Both camera_macos and camera_macos_plus are in pubspec.yaml, (3) Build worked before adding a new camera package. The plugins define the same class name causing Swift registration conflicts.

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Flutter macOS Duplicate Camera Plugin Fix

Problem

Flutter macOS builds fail when both camera_macos and camera_macos_plus packages are present in pubspec.yaml. Both packages define the same CameraMacosPlugin class, causing Swift registration ambiguity.

Context / Trigger Conditions

Error message:

Ambiguous use of 'CameraMacosPlugin.register(with:)'

Symptoms:

macOS build fails during Swift compilation
iOS build may still succeed (different plugin implementations)
Error occurs in the generated plugin registration code
May be accompanied by Xcode build system crashes or "stat cache file not found" errors

Common scenarios:

Project has camera_macos for basic camera support
Added camera_macos_plus for additional features
Transitive dependency pulled in duplicate plugin
Copied pubspec.yaml from another project with different camera requirements

Solution

Identify the duplicates - Check pubspec.yaml for both packages:

# Look for these:
camera_macos: ^0.0.9
camera_macos_plus: ^0.0.3

Choose one to keep - camera_macos_plus is generally preferred as it's a more feature-complete fork of camera_macos

Remove the duplicate from pubspec.yaml:

# Keep only one:
camera_macos_plus: ^0.0.3  # macOS camera support

Clean thoroughly - The Xcode build system may be in a corrupted state:

flutter clean
rm -rf build/
rm -rf macos/Pods/
rm -f macos/Podfile.lock
rm -rf ~/Library/Developer/Xcode/DerivedData/Runner-*
flutter pub get

Rebuild:
```
flutter build macos
```

Verification

After the fix:

flutter build macos completes successfully
No "Ambiguous use" errors in build output
The macOS app launches and camera functionality works

Example

Before (broken):

dependencies:
  camera_macos_plus: ^0.0.3
  divine_camera:
    path: packages/divine_camera
  camera_macos: ^0.0.9  # DUPLICATE - causes conflict

After (fixed):

dependencies:
  camera_macos_plus: ^0.0.3  # macOS camera support (replaces camera_macos)
  divine_camera:
    path: packages/divine_camera
  # camera_macos removed

Notes

camera_macos_plus is a community fork with additional features
If you specifically need camera_macos instead, remove camera_macos_plus
Check transitive dependencies with flutter pub deps if duplicates reappear
The Xcode build system can get into corrupted states after this error; thorough cleaning (including DerivedData) may be required
This is specific to macOS - iOS uses different camera plugin implementations