Can't import photos from iPhone IOS14.4 to iMac running Mojave

Try resetting the iPhone's settings via its General ➙ Reset preference pane:

WARNING: DO NOT click on the "Erase All Content and Settings" button just below it. That's a big NO-NO.

Also see léonie's reply in this topic: Photos questions here! Duplicate photos i… - Apple Community

I had this problem for the past few days, plus half the time Photos wouldn't even recognise that there were new photos to import. When it did, many preview images were just grey boxes and even the ones that loaded preview eventually timed out and gave error -9934 on importing. What eventually worked for me:

• Connected phone to a family member's Windows10 PC and access the new photos via both folder copy-paste and by importing from within Win10's Photos app
• After connecting phone back to my Mac laptop, it now worked perfectly, imported 1600 photos in a matter of minutes.

I have NO IDEA why or how this worked. But since it did, it's probably worth trying.

Apple Support's other suggestions were using the Recovery utility to reinstall the OS (they say there's an option that won't wipe your data / reimage the machine, only restore system files to their standard in case some are corrupt, missing, etc.). But I wouldn't definitely back up your machine before trying that.

Hi,

1. just disable Icloud for photos , go to setting -photos- off the icloud Photos , just slide it to left to make it off
2. if it still not work do a complete restore with latest ios ipsw file but don't forget to backup first
3. remove itune completely and uninstall with like revo uninstaller , reboot install again
4. restore backup and do the step 1 , it will surely work
5. if u need icloud photo or video files you can download from icloud because it will ask to delete from iphone . but later files accessible as usual like earlier

See if you can use Image Capture to download all of the photos from your iPhone to a folder on the Desktop and then import that folder into your library. Any duplicates should be identified with this message:

Just check the checkbook "Apply to all duplicates" and you'll import just the new photos.

Have you tried restarting your mac?

If so - then try restarting in safe mode and see if the problem persists.