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CopySwiftLibs /Users/macbookpro/Library/Developer/Xcode/DerivedData/beeapp-cpbklzhsycxubxegrkeglncegmlr/Build/Products/Debug-iphonesimulator/beeapp.app (in target 'beeapp' from project 'beeapp') cd /Users/macbookpro/Documents/react-native/VirtualMusic/ios export CODESIGN_ALLOCATE=/Users/macbookpro/Desktop/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/codesign_allocate export DEVELOPER_DIR=/Users/macbookpro/Desktop/Xcode.app/Contents/Developer export SDKROOT=/Users/macbookpro/Desktop/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.6.sdk builtin-swiftStdLibTool --copy --verbose --sign - --scan-executable /Users/macbookpro/Library/Developer/Xcode/DerivedData/beeapp-cpbklzhsycxubxegrkeglncegmlr/Build/Products/Debug-iphonesimulator/beeapp.app/beeapp --scan-folder /Users/macbookpro/Library/Developer/Xcode/DerivedData/beeapp-cpbklzhsycxubxegrkeglncegmlr/Build/Products/Debug-iphonesimulator/beeapp.app/Frameworks --scan-folder /Users/macbookpro/Library/Developer/Xcode/DerivedData/beeapp-cpbklzhsycxubxegrkeglncegmlr/Build/Products/Debug-iphonesimulator/beeapp.app/PlugIns --platform iphonesimulator --toolchain /Users/macbookpro/Desktop/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain --destination /Users/macbookpro/Library/Developer/Xcode/DerivedData/beeapp-cpbklzhsycxubxegrkeglncegmlr/Build/Products/Debug-iphonesimulator/beeapp.app/Frameworks --strip-bitcode --strip-bitcode-tool /Users/macbookpro/Desktop/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/bitcode_strip --emit-dependency-info /Users/macbookpro/Library/Developer/Xcode/DerivedData/beeapp-cpbklzhsycxubxegrkeglncegmlr/Build/Intermediates.noindex/beeapp.build/Debug-iphonesimulator/beeapp.build/SwiftStdLibToolInputDependencies.dep

error: Build input file cannot be found: '/Users/macbookpro/Library/Developer/Xcode/DerivedData/beeapp-cpbklzhsycxubxegrkeglncegmlr/Build/Products/Debug-iphonesimulator/beeapp.app/beeapp' (in target 'beeapp' from project 'beeapp')

user8453321
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    I came across the same issue when I upgraded to Xcode 12. Unfortunately, I don't have a solution yet. – Julian Sep 22 '20 at 08:43
  • and so today it ran on my device after restarting my system multiple times but failed on all my simulators strange. – user8453321 Sep 24 '20 at 06:09
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    Same issue here – Rainer P. Sep 24 '20 at 08:14
  • This post helped me https://stackoverflow.com/questions/63993084/problems-after-upgrading-to-xcode-12ld-building-for-ios-simulator-but-linking. Then it could install on xcode, but not the react native cli. I deleted my yarn.lock and ran yarn to update the cli according to https://github.com/react-native-community/cli#updating-the-cli. – Craig1123 Sep 28 '20 at 23:25

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