xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
通过google，查找到以下解决方法：
xcode-select --install
然后重新打开终端就可以了
macOS seria 10.12升级到macOS Mojave的报错：xcrun: error: invalid active developer path, missing xcrun
原文：https://www.cnblogs.com/winnerREN/p/9849738.html