A modern programming language that makes developers happier.

kotlinlang

I have a KMP shared module/lib being compiled to an Apple native "Framework", and I seem to have discovered that the framework's min OS version is being set higher than I'd like. I can't seem to find docs on how to customize the min OS version (specifically for macOS) in the shared lib's KMP Gradle config. Could anyone point me in the right direction for finding that?

Maybe you are looking for this

<https://kotlinlang.org/docs/apple-framework.html#create-a-kotlin-library|https://kotlinlang.org/docs/apple-framework.html#create-a-kotlin-library>

``` plugins {
     alias(libs.plugins.kotlinMultiplatform)
 }
 
 kotlin {
     listOf(
         macosArm64(),
         macosX64(),
         iosArm64(),
         iosX64(),
         iosSimulatorArm64(),
     ).forEach { appleTarget -&gt;
         appleTarget.compilations.getByName("main") {
             val CoreMIDI by cinterops.creating {
                 definitionFile.set(project.file("src/appleMain/cinterop/CoreMIDI.def"))
             }
         }
         appleTarget.binaries.framework {
             baseName = "Shared"
             isStatic = true
         }
     }
 
     jvm()
 
     sourceSets {
         commonMain.dependencies {
             // put your Multiplatform dependencies here
             implementation(libs.kotlinx.coroutines.core)
         }
         commonTest.dependencies {
             implementation(libs.kotlin.test)
         }
     }
 }```

kotlin {
    macosX64("macosX64") {
        binaries.framework {
            baseName = "Shared"
            binaryOption("macos_min_version", "10.13")
        }
    }

  
       
}

i’m not sure if this’ll work but u can try 

And when trying to run the iOS/macOS app on a Mac with OS version 14, I get this error:
```Could not launch “rk_midi_tools”
Domain: IDELaunchErrorDomain
Code: 20
Recovery Suggestion: The app requires a more recent version of macOS.
Please check the app's deployment target.
```
...
```     "sdk_canonicalName" = "macosx15.2";
     "sdk_osVersion" = "15.2";
     "sdk_variant" = macos;
}
--


System Information

macOS Version 14.7.6 (Build 23H626)
Xcode 16.2 (23507) (Build 16C5032a)
Timestamp: 2025-06-22T22:19:47-04:00```

Ah didn't see your 2nd message. I'll try shortly

When building the shared module it gives this warning multiple times:
``` w: Unknown binary option 'macos_min_version'```

And that happens even if I comment out the 3 iOS targets and leave only the 2 macOS targets

Same error for `macos_version_min`.

Do you know where any docs may be for what "binary option" keys are available?

<https://www.jetbrains.com/help/kotlin-multiplatform-dev/compose-native-distribution.html>

I found this docs. Look under LSMinimumSystemVersion.  I dont think itll be applicable since yours is a library not an app