Installing Flutter on MacOS and using IntelliJ
From there, just iterate on brew doctor until it stops warning you about things not being installed.
In IntelliJ, I also got the following warning about the Dart SDK
Of course, when you click on the “Download Dart SDK” link, it points you to install Flutter, which I have done.
After checking the flutter/bin directory, I confirmed that there was nothing that looked like "dart" in there.
After a bit of searing on “Dart SDK is not configured”, I found that Android Studio users were running into the same thing:
In "Dart SDK path" click in "..." and navigate to flutter bin directory. Under that directory you'll find "cache/dart-sdk". This is the dart sdk path you should use.
Sure enough, in ".../flutter/bin/cache/dart-sdk/bin" were all the dart* binaries and alias scripts.
After that (I was already set up in Xcode for iPhone development), it was trivial to build and deploy a basic test app to the iPhone X Simulator.