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Relay can connect to other Relay clients on the same local network in three ways: browser view-only links, Mirror, and Sync.

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Browser view-only

Browser view-only creates a stable local URL that mirrors the currently open tab on the source Mac.
  1. Open Relay > Settings, then select Sync & Mirror.
  2. Enable browser view-only.
  3. Confirm the port shown on the settings page — it defaults to 38475.
  4. Copy the link and open it on any device on the same network — no pairing is required for this mode.

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Mirror

Mirror lets another Relay device view your tab in real time, read-only. Select a discovered peer’s tab from the Sync & Mirror settings and choose Mirror to start viewing it. The source device controls the content; the viewer only watches.

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Sync

Synced Tabs require Relay Pro.
Synced Tabs are fully editable across every device that joins them, with no cloud required — everything stays on your local network. One device hosts a tab; other devices join it from a Sync pill in the toolbar, and layout or content changes push to everyone automatically. Device-specific connections — ProPresenter, Resolume, Shure/Sennheiser, NDI, DAW/MIDI, and audio inputs — always stay local to each machine, even on a synced tab (a console or wireless device configured on one Mac isn’t assumed to exist on another). If the host goes offline, joined devices get a clear prompt to reconnect, keep their own local copy of the tab, or remove it. If two devices edit the same tab at nearly the same moment, the most recent edit wins; Relay does not merge conflicting changes.

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Pairing

Mirror and Sync both require the two devices to be paired first. Relay does not use a shared pairing code — pairing is approval-based, similar to pairing a Bluetooth or AirPlay device:
  1. On the joining device, select the tab you want to Mirror or Sync and start the connection.
  2. On the host device, an approval prompt appears showing the requesting device’s name and what it’s asking for (for example, “wants to join a Synced Tab”).
  3. Tap Approve to let the connection proceed, or Deny to reject it. If there’s no response within 30 seconds, the request times out.
  4. Once approved, the two devices trust each other going forward — no code to re-enter, and no separate approval step for future connections between them.
You can review or revoke trust for any device at any time from Relay > Settings → Sync & Mirror, which lists every device Relay has discovered on the network along with a Paired / Not Paired status. Disabling a device there revokes its access if it was paired, or pre-blocks it from ever successfully requesting a pairing if it wasn’t.
Browser view-only connections skip pairing entirely — they’re covered by the separate “Allow view-only without pairing” toggle on the same settings page, since a browser link has no Relay identity to approve.

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Sync & Mirror settings

Relay > Settings → Sync & Mirror is the single page for all LAN sharing:
  • Browser View-Only Link — the stable local URL described above.
  • Enable LAN sharing — the master toggle for whether this Mac or iPad is discoverable by other Relay clients at all.
  • Allow view-only without pairing — lets browser view-only connections through without going via the approval flow.
  • Devices — one row per device Relay has discovered on the network, showing its pairing status, how many tabs are mirrored or synced with it, and a switch to enable or revoke it.

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SPL Meter and Live Transcription

The SPL Meter module can log local SPL history in Live Mode when configured with a log folder. Live Transcription can:
  • show live transcript entries
  • export transcript text
  • support word-trigger automations

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Troubleshooting

Confirm both devices are on the same network, Relay has Local Network permission, and Enable LAN sharing is turned on for the device you’re trying to reach.

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The approval prompt never appears on the host

Confirm the host device is on and reachable on the network. If a request was recently denied or timed out from the same device, it enters a short cooldown before it can trigger another approval prompt — wait a few seconds and try again. Also check the Devices list in Sync & Mirror settings to make sure the requesting device hasn’t been disabled there.

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A device that used to work now shows Not Paired

Trust doesn’t carry over automatically after certain updates, or it can be revoked from the Devices list. Reconnect using Mirror or Sync as normal — approving the request once re-establishes trust.