Import a bazillion photos from iCloud to mac I am very, very desperate and annoyed at this moment, being the family IT-Guy over long distance, having nothing but remote access to a mac with an iPhone, that is not in any way connected over any account to this Mac.

I have imported all locally stored photos from this iPhone to the Mac, but now I have around 4.000 photos on the iCloud account of this smartphone, that need to be imported today to this Mac. 

Problem:
I am accessing the iCloud photos over the browser, seeing all 4.000 photos, but can only import 1.000 at once. But I cannot, for the life of me pick more than 40-50 photos at once, because the browser won't scroll up, when moving the mouse to the upper edge while selecting. If someone please has a smart solution to this mess I would be extremely thankful!

Please

Thanks for reading. 

In regard of the comment claiming this to be a duplicate of another question:
It's true, they are similar and the presented solution under the other question is awesome, but I need a solution that works today and not within the next 7 days, as it is mentioned by the service provided by apple.
Select a photo, go to another, far away photo, hold Shift and select another. It should download more photos at a time. 

This is not a comprehensive solution to such a situation. Just because questioner can select 40-50 photos in browser, I am suggesting a way to select more.

I recommend Firefox for such download. It comes from experience of Firefox Send. Safari gets stuck in bigger downloads.