Platform resolution issue due to implicit macOS 10.13 default

[denis15yo]

Description

AdjustSdk declares only:

platforms: [
    .iOS(.v12),
    .tvOS(.v12)
]

Since macOS is not explicitly declared, SwiftPM applies the default macOS 10.13.

However, the AdjustGoogleOdm target depends on:

GoogleAdsOnDeviceConversion
which declares:

.macOS(.v10_15)

This creates an invalid platform graph:

• AdjustSdk → macOS 10.13 (implicit default)
• GoogleAdsOnDeviceConversion → macOS 10.15

SwiftPM fails during dependency resolution with:

the library 'AdjustGoogleOdm' requires macos 10.13,
but depends on the product 'GoogleAdsOnDeviceConversion'
which requires macos 10.15

Why this happens

When macOS is not explicitly declared in platforms, SwiftPM assumes macOS 10.13 by default.

Because of that implicit 10.13, the dependency graph becomes invalid.

Suggested fixes

One of the following:

1. Explicitly declare macOS 10.15 in platforms:

platforms: [
    .iOS(.v12),
    .tvOS(.v12),
    .macOS(.v10_15)
]

or

2. Restrict AdjustGoogleOdm target to iOS only using conditional dependencies:

.product(
    name: "GoogleAdsOnDeviceConversion",
    package: "google-ads-on-device-conversion-ios-sdk",
    condition: .when(platforms: [.iOS])
)

Either approach would make the package graph valid for SwiftPM CLI.

Environment

• Swift 5.x
• Fails when running swift package resolve or plugin commands
• Xcode build may succeed due to cached resolution

---

Thank you!

[Aditi3]

Hi @denis15yo ,

Thank you for your feedback. Could you please also share details about your project structure so we can validate the possible resolution on our side?

[denis15yo]

Hi @Aditi3,

Thank you for your response! Running swift build in this package https://github.com/denis15yo/adjust-example results in the following error:

error: the library 'AdjustGoogleOdm' requires macos 10.13, but depends on the product 'GoogleAdsOnDeviceConversion' which requires macos 10.15; consider changing the library 'AdjustGoogleOdm' to require macos 10.15 or later, or the product 'GoogleAdsOnDeviceConversion' to require macos 10.13 or earlier.

Please let me know if you need any additional details.

[Aditi3]

Thanks for your prompt reply.

I'm reviewing your repository and will update you with our findings.