Despite repeated attempts to save my slideshow I kept getting the message:-“Filename” is damaged and can’t be opened.
After extensive repeat attempts varying the content I discovered the message “The App has been modified and the code does not match the original signed code.”
This seems to imply that Apple have not approved this final version of Fotomagico as an official App and the Yosemite security has kicked in.
I changed settings in the Security & Privacy section of Yosemite’s System Preferences, General section so that my machine will allow apps downloaded from “Anywhere”.
This appears to solve the problem.
Fotomagico 4.6.2