iCloud so slow its unusuable
I am collaborating with another mac user and we are trying to use shared iCloud directory and freeform files, but it's unbelievably slow!!! HOURS for just a few mb over a fios 1GB ethernet, hardline (not wifi). This has been an ongoing issue for months which I'd hoped some updates would resolve but it's persistently, unusably slow syncing mac devices with iCloud. Nobody can work on anything important or deadlined like this. Does anyone know how to solve this?
Why is it that every other service such as OneDrive or DropBox actually sync files between shared users reliably at a near instant speed, while iCloud takes hours upon hours to update?
Mac Studio, macOS 15.5