2026 OpenClaw × Ollama Local Inference on a ZoneMac Remote Apple Silicon Mac: Gateway Parallel Routing Runbook (openclaw.json + FAQ)

Three failure modes on unattended gateways

1. Disk and unified memory coupling. Large GGUF unpack spikes coincide with gateway JSONL rotation; APFS snapshots or aggressive concurrency can stall both services without a clear OOM banner in the UI.
2. Implicit egress and compliance drift. Local inference removes cloud token traffic but plugins may still call external APIs—treat outbound policy as orthogonal. See outbound governance patterns (openclaw.json + FAQ).
3. Port semantics vs operator mental models. Successful curl to 11434 on the node does not prove your laptop reaches the same process; 18789 probes must be distinguished from model traffic when automating health checks. VS Code Node on gateway port 18789 runbook.

Routing decision matrix (local vs hybrid vs cloud-only)

Pick a lane before editing configs—changing bind addresses after the fact invalidates firewall tickets and SSH jump recipes.

Seven-step reproducible runbook

1. Freeze network acceptance. Capture median RTT, p95 jitter, and 60s loss to the gateway region; treat >120 ms median RTT as a warning band for interactive tool loops.
2. Install Ollama (ARM64) and pin loopback. Export OLLAMA_HOST=127.0.0.1:11434 in the same environment as your launchd plist so reboots do not revert to wildcard binds.
3. Pull with serialization. One ollama pull at a time; verify df -h maintains ≥15% free after unpack; tag manifests in git for reproducibility.
4. Merge parallel backends. Use the JSON fragment below; keep local route priority 10, cloud route 50, and attach per-route maxConcurrency to cap Metal/ANE contention.
5. Register two launchd labels. Separate ollama serve from openclaw gateway; set ThrottleInterval ≥2s on flaky power environments.
6. Prove listeners. lsof -nP -iTCP:11434 -sTCP:LISTEN and lsof -nP -iTCP:18789 -sTCP:LISTEN; if empty, read stderr logs—not just exit codes.
7. Doctor + minimal generate. Run openclaw doctor, then POST a 16-token smoke prompt to Ollama and confirm gateway request IDs appear in JSONL audit tails.

openclaw.json fragment—parallel backends (illustrative)

Adjust keys to your installed OpenClaw schema; the intent is ordered routes, timeouts, and explicit base URLs so operators can grep configs during incidents.

{
  "models": {
    "router": {
      "strategy": "parallel-failover",
      "routes": [
        {
          "id": "ollama-local",
          "priority": 10,
          "provider": "openai-compatible",
          "baseUrl": "http://127.0.0.1:11434/v1",
          "model": "llama3.1:8b",
          "timeoutMs": 8000,
          "maxConcurrency": 2
        },
        {
          "id": "cloud-overflow",
          "priority": 50,
          "provider": "anthropic",
          "model": "claude-3-5-sonnet-20241022",
          "timeoutMs": 20000,
          "maxConcurrency": 6
        }
      ]
    }
  },
  "gateway": {
    "bind": "127.0.0.1",
    "port": 18789,
    "healthPath": "/health"
  }
}

If your distribution nests gateway fields differently, keep the invariant: Ollama stays on loopback; public ingress (if any) terminates on nginx/traefik with TLS and forwards to 127.0.0.1—never expose raw Ollama on the tenant edge.

Cite-ready parameters

• 8s local route timeout before spilling to cloud in hybrid mode (tunable per SLA).
• 11434 default Ollama TCP port; 18789 common OpenClaw gateway management port—document both in runbooks.
• ≥1.3× advertised GGUF bytes free on APFS before starting pulls on shared audit volumes.
• 2 concurrent local generations as a conservative starting cap on 16 GB unified nodes cohosted with Xcode-scale workloads.

FAQ

Should Ollama listen on 127.0.0.1 only when OpenClaw shares the same Mac?

Yes for typical unattended gateways. Bind to loopback and front any rare LAN requirement with authenticated reverse proxy paths.

Why connection refused on 18789 while 11434 still works?

Different daemons. Inspect launchd exit codes, plist paths, and macOS privacy prompts that block the gateway binary even when Ollama is healthy.

How do I avoid disk-full failures during pulls and JSONL rotation?

Serialize pulls, monitor free space continuously, and relocate heavy model stores to a dedicated volume if audit logs grow quickly.

Does parallel routing bypass outbound governance?

No. Keep domain allowlists, sandbox, and human-in-the-loop gates enabled; local models reduce cloud spend, not security scope.

Why Apple Silicon Mac mini is the cleanest place to run this stack

Ollama and OpenClaw both benefit from high memory bandwidth and quiet thermals: Apple Silicon unifies CPU, GPU, and Neural Engine access to the same memory pool, which reduces the PCIe shuffle you see when bolting GPUs onto small x86 boxes. macOS pairs that hardware with launchd supervision, low crash rates, and predictable POSIX tooling—ideal when your gateway must stay up overnight without a KVM hero.

Security posture matters too: Gatekeeper, SIP, and FileVault give you defense-in-depth on a machine that stores API material and local weights. For total cost, a Mac mini class node draws roughly 4W at idle while still serving inference—far below many tower PCs idling their discrete GPUs.

If you want this hybrid routing recipe on hardware that is engineered for silent 7×24 duty, Mac mini with Apple Silicon is the most balanced starting point—explore ZoneMac nodes and put the runbook above straight into production.