As the Title of my question, I don\'t know how to install the Command_Line_Tools_macOS_10.14_for_Xcode_10_Beta for my mac, please help.
What I did:
It looks like you have two versions of the xcode installed on your machine. First select the latest version of the xcode by running this command:
sudo xcode-select -switch Xcode.app
Once this is done, install the required command line tools but running this command:
xcode-select --install