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sudo chown -R root /Applications/Xcode6.1.1.app/
这里把这个
/Applications/Xcode6.1.1.app/替换成你xocde据在的位置
Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/dyld_sim is not owned by root.
原文地址：http://www.cnblogs.com/songxing10000/p/4885478.html
