What is siriknowledged on Mac?

Last updated: 2026-08-08

What it is

siriknowledged is an Apple-provided, user-level background agent for Siri. It is launched in response to events instead of being evidence, merely by its presence, that Siri is continuously doing work or transferring data. The system executable is located at /usr/libexec/siriknowledged, and its Apple code identifier is com.apple.siriknowledged.

Its responsibilities include maintaining Siri’s CoreKnowledge data store, matching entities, preserving conversation context, and resolving references within that context. In practical terms, those are parts of the machinery Siri uses to associate stored knowledge with people, applications, words, and earlier parts of an interaction. siriknowledged also maintains some Siri asset services.

Those verified responsibilities do not establish that siriknowledged directly looks up every answer Siri provides. In particular, there is no reliable process-level evidence that weather questions, factual queries, and unit conversions are all sent or answered by this executable. Apple attributes those capabilities to Siri as a whole, not specifically to siriknowledged.

Why it talks to the network

One verified reason for network activity is Siri’s iCloud synchronization. When that feature is enabled, siriknowledged can synchronize knowledge or settings records through Apple CloudKit’s private database. Apple Push Service supplies notifications when synchronized data changes, allowing the agent to react without continuously checking for updates.

The agent also performs maintenance associated with Unified Asset Framework subscriptions. This can happen after a system upgrade and during daily maintenance. Relevant assets may then be downloaded by system asset services. The available evidence does not establish whether every byte from those downloads is attributed directly to siriknowledged, so asset traffic should not automatically be assigned to this process.

Several events can activate related work: a CloudKit push notification, a change to an Apple Account or synchronization setting, a change to Siri settings or language, and post-upgrade maintenance. The agent can also be launched in response to settings, contacts, application registration, asset, and synchronization events. Being launched by one of these events does not by itself mean that a network transfer followed.

Apple has not published the precise domains or servers used by siriknowledged. It is also unverified whether any particular Siri question passes through this agent. A connection seen near the time of a Siri request therefore shows timing, not a documented process-level responsibility for that request.

How much traffic is normal

There is no reliable public basis for giving a normal range in kilobytes or megabytes. Apple has not published traffic measurements that would support such a number, and the available process information does not identify every byte that system asset maintenance may cause.

The verified CloudKit record synchronization and push-notification activity is usually intermittent, small metadata traffic. It is closer to synchronizing settings or vocabulary records than to carrying audio or video. That description does not set a fixed ceiling: Unified Asset maintenance may lead to additional downloads, and it remains unclear whether those downloads appear under siriknowledged itself or under another system asset service.

For that reason, a single universal threshold would be misleading. The amount visible on one Mac can depend on which synchronization or maintenance events occurred, while the published evidence is not detailed enough to turn those events into a dependable traffic estimate.

Can you turn it off

Apple does not provide a separate switch for siriknowledged. You can turn off Siri as a whole at:

Apple menu  > System Settings > Apple Intelligence & Siri (or Siri) > Siri > Off

Doing so disables Siri requests, so the Siri assistant will no longer be available. If you enable Siri again later, you may need to set it up again. Turning Siri off is not the same as disabling the siriknowledged launch agent, and it does not guarantee that this event-driven system process will disappear completely from Activity Monitor.

If your concern is specifically Siri data synchronization rather than the assistant itself, you can turn off Siri’s iCloud synchronization at:

Apple menu  > System Settings > [your name] > iCloud > Saved to iCloud > See All > Siri

That setting addresses synchronization without being a dedicated process control. Force-quitting siriknowledged is not a permanent off switch because launchd can start the agent again when another relevant event occurs.

What people get wrong

• “siriknowledged is the process that looks up weather, facts, and unit conversions.” There is no process-level evidence supporting that assignment. Siri offers those capabilities, but that does not prove that this executable directly queries or answers them.

• “If it appears in Activity Monitor, Siri must be continuously uploading data.” Process presence is not proof of network transfer. launchd can start siriknowledged for settings, contacts, application-registration, asset, and synchronization events, including events that do not lead to an upload.

• “Force Quit or launchctl is a safe permanent optimization.” siriknowledged is a launchd-managed system agent and may return after the next relevant event. Forcibly disabling it may interfere with Siri data synchronization, vocabulary records, entity matching, or conversation-context and reference resolution.

• “If I do not use Siri, it is definitely safe to block siriknowledged in a firewall.” That conclusion is unverified. Apple’s supported controls are the Siri and Siri iCloud synchronization settings; there is no published Apple guidance establishing that independently blocking this system executable is safe.

• “A process with this unfamiliar name is probably malware.” The file at /usr/libexec/siriknowledged, carrying the code identifier com.apple.siriknowledged, is an Apple system component. Its unusual name alone is not grounds for classifying that file as malicious.

Seeing what it actually used

If you are investigating unexpected traffic, the useful next step is to measure siriknowledged separately over the period when the activity occurs. Bytetally’s per-process statistics can show how many bytes the process actually used and when the transfers appeared. Compare that timeline with Siri, iCloud, language, account, and system-maintenance changes instead of assuming that process presence equals network use.

Related processes

Common questions