Ruby on Mac
Ruby on Mac: Fix Command Line Tools Path#
Ruby compilation can fail on macOS when the active Xcode command line tools path points to a deleted or missing Xcode installation.
Example error:
xcrun: error: active developer path ("/Applications/Xcode.app/Contents/Developer") does not exist
Install or select the command line tools:
xcode-select --install
If the tools are already installed, switch to them:
sudo xcode-select --switch /Library/Developer/CommandLineTools
Check the active path:
xcode-select -p