Unable to build for Mac: adding ad-hoc signature failed

[Dar Scott]

I’m having trouble building an application for Mac Intel.

The first time LiveCode crashed.

Subsequent times, I get this error:
There was an error while saving the standalone application
Adding ad-hoc signature failed with error:
/…/myProgram.app:
Replacing existing signature
/…/myProgram.app:
Resource for, Finder information, or similar detritus not
Allowed

I tried fiddling with the PLIST settings without success.