[Bug]: @rnmapbox/maps fails to build on Xcode 26 (Swift 6.2) — MapboxCoreMaps Swift version mismatch #4178
Description
Mapbox Version
11.20.1
React Native Version
0.77.3
Platform
iOS
@rnmapbox/maps version
10.2.10
Standalone component to reproduce
import Mapbox from '@rnmapbox/maps';
import {StyleSheet, View} from 'react-native';
const BugReport = () => {
return (
<Mapbox.MapView style={styles.map}>
<Mapbox.Camera centerCoordinate={[15.97, 45.81]} zoomLevel={14} />
</Mapbox.MapView>
);
};
const styles = StyleSheet.create({
container: {flex: 1},
map: {flex: 1},
});
export default BugReport;
Note: The issue is a compile-time Swift version mismatch — this component will never run. Any import of @rnmapbox/maps reproduces the failure when building with Xcode 26.
Observed behavior and steps to reproduce
No response
Expected behavior
No response
Notes / preliminary analysis
error: 'DataRef' is unavailable: cannot find Swift declaration for this class
error: failed to build module 'MapboxCoreMaps'; this SDK is not supported by
the compiler (the SDK is built with 'Apple Swift version 6.0.3 effective-5.10
(swiftlang-6.0.3.1.10 clang-1600.0.30.1)', while this compiler is 'Apple Swift
version 6.2.4 effective-5.10 (swiftlang-6.2.4.1.4 clang-1700.6.4.2)').
Please select a toolchain which matches the SDK.
Xcode: 26.3.0 (Swift 6.2.4 / clang-1700.6.4.2)
iOS deployment target: 15.5
New Architecture: disabled
Platform: iOS Simulator (arm64)
Additional links and references
No response