Apple Aperture library import to Lightroom Classic: Failed to import Photos
I have just obtained a subscription to Adobe Lightroom Classic and I tried importing all of my photos from my Apple Aperture Library in an external hard drive to Lightroom Classic by following the steps outlined on this Adobe help page.
The import took a long time (60+ hours) but was successful in importing 21,373 photos. I did not encounter any glitches. Unfortunately upon completion of the import, I received a notification letting me know that some photos were not imported. I exported the list of not imported photos into a text file and it is huge. There were so many photos that failed to import.
The failed to import text message follows the following format:
Failed to import /Volumes/ExternalDrive/Aperture Library.aplibrary/Masters/2011/01/23/20110123-171647/GreenGarden_5:1:03.JPG. (Possible reasons include asset offline or unsupported asset type.)
Copied /Volumes/ExternalDrive/Aperture Library.aplibrary/Masters/2011/01/23/20110123-171647/GreenGarden_5:1:03.JPG to /Users/username/Pictures/LightroomMasters/NotImported/GreenGarden_5:1:03.JPG
The possible reasons given: "asset offline" or "unsupported asset type" do not make sense to me. I am assuming a .JPG format is fine and indeed I checked in Lightroom plenty of .JPG files were imported without any issues As far as I can tell the asset is not offline. I did a parallel test and import the Aperture Library to Apple Photos, the missing assets were imported without any problems.
I am confused on this issue and what I can do to find a solution. Any assistance would be greatly appreciated.
I am currently using: macOS Catalina version 10.15.3 and Adobe Lightroom Classic 9.1 release, Build [201911291132-64cf90b4]
