An invitation copied from Connect Another Mac carries the bLine Cloud address in front of the four words. The Join button's own check counted the dashes in the whole thing, address included, and decided it was not four words, so it stayed greyed out while the action behind it would have worked. The button and the action now use the same parser.

On a second Mac, "Join my other Macs over the internet" used to lead to the bLine Cloud setup screen, and the link there for an address you already had would quietly make that Mac the first of a new bLine, complete with its own invitation. It now goes straight to pasting the invitation from your other Mac. The invitation already carries the bLine Cloud address, so there is nothing else to type. The setup screen's address field is reworded for the one case it is for: a relay you deployed yourself.

Setting up bLine Cloud is a button on the first-Mac screen rather than a small link, and the onboarding window has more room top and bottom.

On a brand-new Mac, the last step of setup could sit on "This Mac connected" for as long as the card stayed open, and turn green the moment it closed. The relay connection needs a group to belong to, and a fresh Mac only became a group of one when the "You're all set" screen appeared afterwards. A Mac that creates a relay is the first Mac of a new bLine, so it becomes one the moment it connects, and the connection that used to fail silently now says so in the log.