Q: Photos is no longer displaying the correct capture time

Thanks, LarryHN. I am not aware of any changes to Lightroom or my export workflow from it. I use a custom preset for this that I have not changed, so it is hard to know were to start looking. I use Lightroom 4.4. The export preset has metadata set to "all". Other software, eg Affinity Photo, displays the correct metadata from the exported jpegs.

Thanks for your reply, Old Toad. No, it doesn't. The Capture Date/Time for the exported jpeg is correct but Photos displays the jpeg creation time (today) not the image capture time (yesterday). If I import the DNG file into Photos the time displayed is the capture time. If I check the metadata of the jpeg file in Photos Master folder, the capture time is correct but Photos displays the jpeg creation time. I guess this must be a change introduced in March as my workflow is unchanged as is my copy of Lightroom. From my viewpoint (and I suspect others might agree) this is a bug. I want to see the original capture time displayed, I don't really care when the jpeg file was created.

Yes, that's right.

Repairing the library does not appear to have had any effect. Jpegs imported 15 Mar 2016 and earlier still show Capture Time in the Info panel while those imported on 21 Mar 2016 and later show the creation time for the jpeg file, not the image capture time. Incidentally, where I corrected the time with the Adjust Date and Time... the correction is preserved, so I guess that the Repair process is not re-reading the Date/Time information directly from the jpeg file.

As a further experiment I exported two jpegs from Photos then reimported them.

Case 1: this file was originally imported before this problem surfaced in March so it was displaying the correct capture time. When exported then reimported it now displays todays date and the export time, not the correct capture time.

Case 2: this file is more recent but I had corrected the Date and Time using Photos menu item for this purpose. When exported and reimported it also displays the the export date and time, i.e. just now.

I think the evidence is mounting that Photos was changed in March so that it no longer reads the Capture Time from the EXIF data during the import process but reads the file creation or modification date instead.

The new library created within my usual user showed the same behaviour, i.e. Creation Date not displayed. In a different user the behaviour did not occur and newly imported jpegs displayed the correct Creation Date.

I keep a copy of my Photos library on a MacBook Pro. On this system the problem does not occur. I copied the Photos library from the MacBook Pro onto this iMac and the problem appeared.

So now I'm guessing that there is something in my user folder on the iMac but not within the Photos library that is causing the problem and this something was introduced between 16 and 21 March 2016. The iMac is older than the MacBook Pro so may have more stuff left over from older systems that has survived the more recent updates, could that be the problem? There are two Preference files with Photos in the title but deleting them has not helped. They didn't seem to contain much anyway.

Thanks for all the effort you are making for me here. I'm not sure why you are suggesting the deletion of iDVD files when the problem is in Photos.