deleting a large group of photos in photos (like from a game cam)
You can shift select &amp; delete all at one go, if you set the view correctly…


Enable the Sidebar  Cmd ⌘   Alt ⌥   S  
Set the view to Albums > All Photos 
Click the first in the series  
Hold  Shift ⇧  &amp; click the last  
Either right click &amp; choose "Delete nnn Photos" or hit  Delete ⌦  [with confirmation] or
 Cmd ⌘   Backspace ⇤  [with no confirmation]


If the pictures are not entirely sequential, you can creat more complex selections using  Shift ⇧  click &amp;  Cmd ⌘  click.