I've never seen that QuickStart contribution page before.
Do you know where it's linked from, and who's responsible for updating it?
It contains some outdated information, such as:
- the macOS 10.14.4 and Xcode 11 beta 1 requirements,
- the 2019-06-06 snapshot,
- the CMake and Sccache versions.
Should the page link to the new How-To Guides instead?