Escape key no longer functioning to back out of photos in Event view

Or use Keyboard Maestro (indispensible IMHO) to remap Escape key to Comand-Left Arrow.

I know this discussion is a year old, but I finally bought Keyboard Maestro, and I had to come here and say wow: that is so much easier. Thanks for the suggestion!

Space Key (as other have mentioned). It is counter-intuitive, not only because ESC used to work, and works on EVERYTHING ELSE, but also because SPACE used to be for PLAY/PAUSE videos ...

go figure...

But ESC works as expected in iCloud. Go figure ...

You get this is a year's old thread and that iPhoto has no iCloud component?

My version of I Photo stopped working with Sierra. Apple support had me replace it with 'Photos' where I first experienced this. As the successor to iPhoto, the bad user experience persists