CHIRP

chirp-daily-20190412.app, freshly installed on Mac OS X 10.11.5, was refusing to run. Finder showed an alert reading, 'The application "chirp-daily-20190412.app" can't be opened'.

This is a different problem than Mac OS Application Security as described in https://chirp.danplanet.com/projects/chirp/wiki/MacOS_Tips#Application-Security-in-109x. I was right-clicking on the application, selecting "Open" from the pop-up menu, and then the failure alert appeared. Past versions of chirp have opened fine on this particular machine and OS with this method.

I worked around the problem by setting the "execute" file mode on /Applications/chirp-daily-20190412.app/Contents/MacOS/chirp. I did this from the Terminal, with the commands:

sudo chmod a+x /Applications/chirp-daily-20190412.app/Contents/MacOS/chirp

(Mac OS asks me to enter my administrator password.)

/Applications/chirp-daily-20190412.app/Contents/MacOS/chirp

The chirp app runs. I quit the app.

Then, I repeated right-clicking on the application, selecting "Open" from the pop-up menu. This time Chirp started up.

Interestingly, once I got Finder to start chirp successfully once, it didn't matter if I reset the "execute" mode on the /Applications/chirp-daily-20190412.app/Contents/MacOS/chirp file. The app still runs. However, I will observe that four earlier daily versions of chirp had the "execute" mode set on that MacOS/chirp file.