[nemothekid]

I think if you are on PC. But on Mac with the Photos App

Cmd+A > File > Export Unmodified Originals

[reconnecting]

There is no straight way to download photos from iCloud to Mac.

[wookmaster]

The comment you're replying to just gave one, I did it recently for 70k photos. select all > export. That's it. It just took 30 hours.

[marscopter]

Photos > Settings > iCloud > Download Originals to this Mac.