For those running a Flutter app, do the following: run flutter clean Delete your Podfile.lock file and your Pods directory (ios/Pods) run flutter pub get Update your Podfile by replacing your post_install section with the following: post_install do |installer| installer.pods_project.targets.each do |target| target.build_configurations.each do |config| config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '12.0' end flutter_additional_ios_build_settings(target) end end cd into your ios directory and run pod install build your app flutter run Hope this helps!