xcrun: error: unable to find utility "PackageApplication", not a developer tool or in PATH
后面根据对比发现新版的Xcode少了这个PackageApplication（转注：PackageApplication在前几个版本已被标识为废弃，在8.3版本彻底移除了）
先去找个旧版的Xcode里面copy一份过来
放到下面这个目录：
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/
然后执行命令：
sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer/
chmod +x /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/PackageApplication
2句分开执行
最后附上PackageApplication下载地址： https://github.com/JackSteven/PackageApplication/blob/master/PackageApplication.zip