Copy warning message when you hover over a WORD in Android Studio using Mac
Alt+click
(left button of the mouse) on popup copies the whole text. Tested on android studio 3.6 windows 10.
This is an IntelliJ inherited problem. You can find a workaround here.
Basically, click on the error/warning in order to have the cursor on it. Then you will find the same message in the message bar on the bottom. Right-click and copy
I think it is possible to mark it with the mouse and while you still hold the mouse button down press cmd + c.... but in fact this is not a shortcut.