Managing iPhoto Library
Partner and I have just come back from OS trip and want to organise a whole bunch of photos on two iPhones, both now iOS 12. I have noticed that if I connect them to my iMac, I can't mass-select and delete photos off the iPhones. It appears I have to open the iPhoto app and then select each photo I want to delete individually.
Do I really have to do this 1,234 times to tidy up the library? Is there any kind of mass delete or file management utility in iPhoto?
iMac, macOS Sierra (10.12.3), Upgraded to Sierra