Installing Xcode command line tools error: The package “DeveloperToolsCLI.pkg” is untrusted
Probably the certificate is outdated. To circumvent this the following procedure should work:


Open "System Preferences"
Hit "Security &amp; Privacy"
Hit the tab "General"
Click the lock and enter your admin password
at "Allow applications from anywhere" mark the radio button "Anywhere"
then click the button "Allow from anywhere"




or like indicated in the screenshot above control-click individual apps/installer-apps and select "Open". This probably doesn't work for the DeveloperToolsCLI.pkg but for other apps.