Unreal Engine 4 Installed but won't run (macbook Pro)

hi there i need help, im using a macbook pro (15" 2017) running on macOS Sierra version 10.12.6.
i have successfully installed everything but after installation, Unreal Engine just wont run no matter how many times i tried to run it. please help

Minimum Software Requirements: macOS 10.14 Mojave.
You need to update, it’s free.