Dpp4 can’t access images on external drive

[olyduck]

My DPP4 “sees” the external drive with my Mac Photos Library, but doesn’t display images.  I’ve given DPP4 full disk access.  Now what?

[johnrmoyer]

It may also work when photos.app is running to go to Photos->Settings->General->Show in Finder

In Finder, control-click on image and Open With->Other

browse to Canon folder and DPP.

After this, for me DPP seems to see the photos in the library.

This is not how I usually do things, so your results may vary. This lets me see the files in ~/Pictures/ but not in Photos.library. How they are imported might make a difference.

If I browse to "Originals" in the library in DPP, then I can open a file for editing.

Johns-iMac.local[20423]$ ls -al /Users/jrm/Pictures/Photos\ Library.photoslibrary/originals/0
total 121848
drwxr-xr-x@  4 jrm  staff       128 Aug  8  2021 .
drwxr-xr-x@ 15 jrm  staff       480 Mar 19  2021 ..
-rw-r--r--@  1 jrm  staff  38813062 Nov 14  2020 0AE019A2-9779-44F5-83C3-FD9799325430.cr2
-rwxrwxrwx@  1 jrm  staff  23568470 Aug  7  2021 0AFC186F-083B-4936-B683-E8400F861C14.cr3

[jrhoffman75]

Similar situation with Lightroom.

Migrate photos and videos from Apple Photos to Lightroom (adobe.com)