I used to have this problem but then I figured how to program a keyboard short cut and it is 1 keystroke to delete all the photos. It is under the drop down menu “listing” but I cant remember how I made it into a keyboard shortcut.
fedege96 It is a preference that you can program as a keyboard shortcut. I pasted directions that I googled.
Choose Apple menu > System Preferences, click Keyboard, then click Shortcuts.
Select App Shortcuts on the left, click the Add button , click the Application pop-up menu, then choose a specific app or All Applications.