I faced similar problem on MacOS Mojave version 10.14.3 with Xcode 10.3 installed. It seems that the problem was that the new version of the tools are installed to a different directory, and xcode-select -r is not clever enough to find the latest version. Now, sudo xcode-select -p returns /Library/Developer/CommandLineTools/. But xcode-select -install said the command line tools were already installed. sudo rm -rf /Applications/Xcode.appĭeleted version 8 of the tools.

Xcode-select -p returned /Applications/Xcode.app/Contents/Developer, and clang -version reported an installation directory under there. xcode-select -r and rebooting didn't solve this issue.

But clang -version still gave 8.0.0 as the version number. The App Store didn't suggest this upgrade, and neither did softwareupdate -list. I wanted to upgrade the command line tools from version 8 to 9. Hopefully it'll help someone (and it'll surely help me next time I run into the same issue). I'm going to answer a slightly different question here, because this question came up when I searched for a solution to my problem.

How to update your mac software 10.13