The Rhino MCP server silently never started on a Mac with no supported AI client installed: slot listing came back empty, commands timed out at 120 seconds, and nothing was logged.
From the Grok pain-radar digests, Oct 27-28 2026 (Oct 27 8:41 AM ET through Oct 28 7:41 AM ET digests plus the Haitch editions). Verified live 2026-10-28: issue/PR/thread read; title and state confirmed.