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:
This worked for me:
/Applications
Xcode-beta
application and wait for it to install necessary packages when it prompts it at launchsudo xcode-select -switch /Applications/Xcode-beta.app/
Now brew update
should work again.