I have suddenly started getting this message and don't know how to resolve it as I am new to Xcode and Swift. It 'might' be related to me adding a png file as an App icon - I have removed this but the problem remains.
CodeSign /Users/user_name/Library/Developer/Xcode/DerivedData/USMMdecoder-fvsukxgrkprshhgobtpazqhwcyxm/Build/Products/Debug/USMMdecoder.app (in target 'USMMdecoder' from project 'USMMdecoder') cd /Users/user_name/Temp/USMMdecoder export CODESIGN_ALLOCATE=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/codesign_allocate Signing Identity: "Apple Development: peter at xxxxx.xxx (N4B2PUK5K5)"
/usr/bin/codesign --force --sign 773B32FF45F759E4951F011400FDFC9063693882 -o runtime --entitlements /Users/user_name/Library/Developer/Xcode/DerivedData/USMMdecoder-fvsukxgrkprshhgobtpazqhwcyxm/Build/Intermediates.noindex/USMMdecoder.build/Debug/USMMdecoder.build/USMMdecoder.app.xcent --timestamp\=none --generate-entitlement-der /Users/user_name/Library/Developer/Xcode/DerivedData/USMMdecoder-fvsukxgrkprshhgobtpazqhwcyxm/Build/Products/Debug/USMMdecoder.app
/Users/user_name/Library/Developer/Xcode/DerivedData/USMMdecoder-fvsukxgrkprshhgobtpazqhwcyxm/Build/Products/Debug/USMMdecoder.app: resource fork, Finder information, or similar detritus not allowed Command CodeSign failed with a nonzero exit code
Anyone have any ideas how I fix this?