Stopping Photos 1.5 app from launching when iPhone plugged in
I have an older macbook (2013 Retina 13" Macbook) running El Capitan.
I want to prevent the Photos app from launching whenever I plug in my iPhone to charge.
I have had no joy with internet searches, which refer me to procedures and features that just don't exist in this setup (such as devices in the Photos side-bar – doesn't show, nothing to adjust).
I can't seem to delete the app (though I have no use for it at all) because it seems to be tied to the operating system.
Does anyone have any clues as to how I can fix this and stop Photos from launching?
MacBook Pro 13″, 10.11