Não tenho idéia do motivo pelo qual estou recebendo esse erro. Acredito que tenho todos os perfis de provisionamento corretos e tal. Acabei de mudar para um novo computador, mas também trouxe a chave do desenvolvedor de chaveiro privada. Como meus arquivos de desenvolvedor foram sincronizados com o Dropbox, não precisei passar pelo projeto Xcode. Aqui está o erro:

   CodeSign "/Users/michaellindahl/Library/Developer/Xcode/DerivedData/Fraction_Calculator-cgirhuuvywfnsyenisucsuauquoz/Build/Products/Debug-iphoneos/Fraction Calculator Pro.app"
    cd "/Users/michaellindahl/Dropbox/Xcode/lindahl studios/FractionCalculator"
    setenv CODESIGN_ALLOCATE /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/codesign_allocate
    setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /usr/bin/codesign --force --sign "iPhone Developer: Michael Lindahl (MXXX0X0XXB)" "--resource-rules=/Users/michaellindahl/Library/Developer/Xcode/DerivedData/Fraction_Calculator-cgirhuuvywfnsyenisucsuauquoz/Build/Products/Debug-iphoneos/Fraction Calculator Pro.app/ResourceRules.plist" --entitlements "/Users/michaellindahl/Library/Developer/Xcode/DerivedData/Fraction_Calculator-cgirhuuvywfnsyenisucsuauquoz/Build/Intermediates/Fraction Calculator.build/Debug-iphoneos/Fraction Calculator Pro.build/Fraction Calculator Pro.xcent" "/Users/michaellindahl/Library/Developer/Xcode/DerivedData/Fraction_Calculator-cgirhuuvywfnsyenisucsuauquoz/Build/Products/Debug-iphoneos/Fraction Calculator Pro.app" 

CSSM_SignData returned: 8001094A
    /Users/username/Library/Developer/Xcode/DerivedData/Fraction_Calculator-cgirhuuvywfnsyenisucsuauquoz/Build/Products/Debug-iphoneos/Fraction Calculator Pro.app: unknown error -2070=fffffffffffff7ea
    Command /usr/bin/codesign failed with exit code 1

brigado pela sua compreensã