How do I connect a Mac node to a remote Gateway Tailscale Serve

Serve exposes the Gateway Control UI + WS. Nodes connect over the same Gateway WS endpoint.
Recommended setup:
Make sure the VPS + Mac are on the same tailnet.
Use the macOS app in Remote mode (SSH target can be the tailnet hostname). The app will tunnel the Gateway port and connect as a node.
Approve the node on the gateway:
openclaw nodes pending
openclaw nodes approve <requestId>
Docs: Gateway protocol, Discovery, macOS remote mode.