Unfortunately I have problems opening Xnview on Mac. (I assume the archived MacOS forum should indicate that it had been merged with others).
Preferences / Security & Privacy / General / Allow apps downloaded from: Anywhere (is active)
The message on opening
The system help gives further instructions:can’t be opened because the identity of the developer cannot be confirmed.
The app has been modified or damaged
The app has been modified, and its code does not match the original signed code. The app may be broken or corrupted, or it may have been tampered with. If you think that an app has been damaged or tampered with, you should delete it by dragging it to the Trash.
I've tried 2 ibrowsers, changing permissions. What else is there to try? Thanks!