Hi
I am really sorry for my disrespectful comments to your posts. Please accept my apologies.
You are right, the ''originals in the cloud being stuck downloading in original format to a Mac from the cloud'' does not have a solution in this thread.
As I have answered you, I was referring to this type of iCloud problem: ''I found that, for me, what solved the issue of Photos being "stuck" and not uploading from iCloud was turning off my iCloud account and then turning it back on.'' covered by Liverpool Webmaster on pages 8 10 11 13, MutantSquid on pages 6 7, cathmce on page 9.
I have misread your comments, and I have thought that the right solution for you was already covered by the 3 users listed above. Hence, me suggesting that you should read the earlier posts.
I hope it will be resolved soon.
Best of luck !