title: Xcode Apple Mach-O Linker Error 1
body: <p>after renaming my project whenever I try to build the app I get an
  <strong>Apple Mach-O Linker Error</strong> 
  below is the output from Xcode itself</p>
  
  <pre><code>Ld /Users/joshevans/Library/Developer/Xcode/DerivedData/Broadcast!-gbvxmzbukuqqgxcmlipegtnzosze/Build/Products/Debug-iphonesimulator/Broadcast!Tests.xctest/Broadcast!Tests normal x86_64
      cd "/Users/joshevans/Desktop/sn app/SwifferApp"
      export IPHONEOS_DEPLOYMENT_TARGET=8.0
      export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
      /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
  -arch x86_64 -bundle -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.1.sdk
  -L/Users/joshevans/Library/Developer/Xcode/DerivedData/Broadcast!-gbvxmzbukuqqgxcmlipegtnzosze/Build/Products/Debug-iphonesimulator
  -F/Users/joshevans/Library/Developer/Xcode/DerivedData/Broadcast!-gbvxmzbukuqqgxcmlipegtnzosze/Build/Products/Debug-iphonesimulator
  -F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.1.sdk/Developer/Library/Frameworks
  -F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Frameworks
  -F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.1.sdk/Developer/Library/Frameworks
  -filelist /Users/joshevans/Library/Developer/Xcode/DerivedData/Broadcast!-gbvxmzbukuqqgxcmlipegtnzosze/Build/Intermediates/Broadcast!.build/Debug-iphonesimulator/Broadcast!Tests.build/Objects-normal/x86_64/Broadcast!Tests.LinkFileList
  -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -rpath -Xlinker @loader_path/Frameworks -bundle_loader /Users/joshevans/Library/Developer/Xcode/DerivedData/Broadcast!-gbvxmzbukuqqgxcmlipegtnzosze/Build/Products/Debug-iphonesimulator/SwifferApp.app/SwifferApp
  -Xlinker -objc_abi_version -Xlinker 2 -framework XCTest -L/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphonesimulator
  -Xlinker -add_ast_path -Xlinker /Users/joshevans/Library/Developer/Xcode/DerivedData/Broadcast!-gbvxmzbukuqqgxcmlipegtnzosze/Build/Intermediates/Broadcast!.build/Debug-iphonesimulator/Broadcast!Tests.build/Objects-normal/x86_64/Broadcast_Tests.swiftmodule
  -mios-simulator-version-min=8.0 -Xlinker -dependency_info -Xlinker /Users/joshevans/Library/Developer/Xcode/DerivedData/Broadcast!-gbvxmzbukuqqgxcmlipegtnzosze/Build/Intermediates/Broadcast!.build/Debug-iphonesimulator/Broadcast!Tests.build/Objects-normal/x86_64/Broadcast!Tests_dependency_info.dat
  -o /Users/joshevans/Library/Developer/Xcode/DerivedData/Broadcast!-gbvxmzbukuqqgxcmlipegtnzosze/Build/Products/Debug-iphonesimulator/Broadcast!Tests.xctest/Broadcast!Tests ld: file not found: /Users/joshevans/Library/Developer/Xcode/DerivedData/Broadcast!-gbvxmzbukuqqgxcmlipegtnzosze/Build/Products/Debug-iphonesimulator/SwifferApp.app/SwifferApp clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>thanks for your help, as I'm new to Xcode and the swift language.
  Josh</p>