zorinlynx
macrumors G3
Or between two Macs, one of which isn't signed into iCloud at all.Considering that's precisely the mechanism they came up with for that functionality (very much in line with other well-known features, like AirDrop and Continuity/Hand-off), it is highly unlikely that it will ever work across different IDs.
My work iMac wasn't signed into iCloud at all until a few months ago because I needed it to receive 2FA codes for signing into an Apple Developer account. It would literally not be signed into iCloud at all still if I hadn't needed that.