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Rendering Error in layout Message/Item: array_keys(): Argument #1 ($array) must be of type array, null given. Please enable debug mode for more information.

This is GREAT information mate. Thank you very much for sharing!

Very good job! I have no device with macOS to check it, but I really appreciate your effort to build the game from scratch on macOS and describe the whole process. Seems quite easy to follow. Great!

It's working like a charm Just compiled the client on MacOS 10.15.2 (Catalina)

Just make sure that the "Command Line Tools" package has been installed! Otherwise the system will complain about GCC that is not present!
You can do this by running the following command on the terminal prompt:

xcode-select --install

Then follow the above procedure

Thanks again trastanechora

Oh yes,, I missed the GCC part, thanks Mr. Frank. I hope every OSX user could make use of our tips

Rendering Error in layout Message/Item: array_keys(): Argument #1 ($array) must be of type array, null given. Please enable debug mode for more information.