Q: Photos for Mac says "Unable to upload 222 items"

Sorry but unfortunately we are unable to see, your image is far too small.

OK, could these be referenced images.

Do you still have the library that you migrated from. If so get the filename of each of the images from the info window in Photos and search for them in your previous library. Hopefully you will find them and be able to re-export them to add to Photos.

I also have this issue after upgrading to El Capitain. Perhaps they always were there, but it's just that El Capitain shows this info?

to see them make a smart album - file menu ==> new smart album with criteria photos is unable to upload toe iCloud Photo library - then you should be able to resolve or delete the items

LN

Yes, now I see them. It seems that it's photos that only have thumbnails. I guess there is nothing to do but deleting the photos.

great advice - finally fixed an issue that has existed for weeks.  thanks

Had two photos unable to load.  They were from 2002 and 2006 (no pic even showing).  I deleted them after reading this post.  Very helpful!

Thanks for the clever tip to identify the problematic photos.

Is it possible to re-sync these photos to the iCloud?

I don't want to delete them - I want them uploaded to my Photos iCloud library.

Many thanks

Thanks for the tip. Was able to see what isn't syncing and just deleted them.

Thanks from yet another for this helpful tip. I note in my version of this Smart Folder, I have versions of the same pix on other devices, so I am hesitant to delete them. ("Delete images" promises to delete them on my iCloud space as well: puzzling.) But at least I know the items that are the objects of the Photo app's gripe, and they may be a more precise target for my own puzzlement. As it were.