It is a new MacBook Pro, SSD drive with no other issues.
I use it for Fusion 360, 3D printing etc.
The computer is fine.
This forum website had loads of errors just trying to register an account then login. There are maybe 50 error reports like mine.
The IDE software attempting to search for a {file name} variable is convincing proof the Mac version of IDE is broken. It is attempting to search for a variable and not an actual file name. This is a software problem. My hard drive is fine...unfortunately.
I noticed I downloaded the "nightly" build version of IDE... obviously it is not ready for game day. I am downloading a normal / legacy version next.