Why does Mac dictation keep stopping?

Mac Dictation stops by itself when it detects no speech for 30 seconds ¹. That is the documented reason, and it is a pause timer, not a limit on length. Apple says you can dictate text of any length without a timeout, and you stop Dictation yourself with Escape, the Microphone key or the Dictation shortcut ². So a long session is not what cuts you off. A pause longer than 30 seconds is. Press the shortcut again and carry on.

The 30-second rule ends the session when you go quiet

The Dictation feature (see what dictation is) listens for speech and types what it hears. When it hears nothing for 30 seconds ¹, it ends the session. You do not need to say anything special to keep it running. You need to keep speaking, or to start it again. If you stop to check a note, read a sentence aloud from another window, or think for half a minute, the session ends, and you press the shortcut to continue.

Apple's wording is that Dictation stops when no speech is detected, so the timer depends on the Mac hearing your voice. If the microphone is picking up the wrong input or hears very little, the Mac may not register speech at all, and the same timer applies. That is why the input is the second thing to check, and the reason the microphone page matters for this problem.

Three things can look like a stop but are not the timer

Holding the Microphone key opens Siri. Pressing and releasing the Microphone key starts Dictation, while pressing and holding it activates Siri, if Siri is enabled ³. If Dictation seems to vanish when you hold the key, you have started Siri. Tap the key and let go.

A Bluetooth headset can reduce the audio. When a headset's microphone is in use, Bluetooth switches to a second mode, and Apple says audio quality is reduced until the microphone is no longer in use ⁴. Apple does not say that this ends a Dictation session. It does mean the Mac may hear less of your speech, so the silence timer can run while you are talking. Test with the built-in microphone to see whether the stops stop.

A weak connection may matter. Apple says Dictation on a Mac may need an internet connection ⁵. Apple does not say a lost connection ends a session. Treat it as something to test, not as a confirmed cause, and check your connection in Network settings if the stops happen only on a particular network.

Older macOS versions had a stricter cap

Some people remember a limit that is different from the silence timer. A 2014 Engadget article describes how to bypass the usual 30-second dictation limit in OS X Mavericks and dictate offline ⁶. Treat that detail as history: it comes from a secondary article about an old version of macOS. On a current version of macOS, the rule Apple documents is the silence timer, and the length of your dictation does not matter.

If you run an old macOS, check the version under Apple menu > About This Mac before you rely on any step here. The steps in this answer describe the current Mac User Guide.

What to do when Dictation stops

1. Time the pause. If you were quiet for more than 30 seconds, the timer did its job. Restart Dictation and keep going.
2. Restart it the documented way. Press the Dictation shortcut, tap the Microphone key, or choose Edit > Start Dictation ⁷. Escape also stops it, so you know the state before you start again.
3. Test for a fault. Open Notes, start Dictation, speak a sentence, and then pause for about 35 seconds. If it stops on the pause, the timer works as documented. If it stops after a few seconds of speech, or during speech with no pause, something else is wrong.
4. Check the input when it stops during speech. Confirm the microphone in Keyboard settings, as explained in how to change the microphone Mac dictation uses. Switch off a Bluetooth headset for the test.
5. Restart the feature if the stops continue. Turning Dictation off and on in Keyboard settings is the reset step that fits this problem. The steps are in how to reset dictation on a Mac.

When the stop is not a timer

A stop that happens within a few seconds of speech is not explained by the documented timer, so it is a fault to track down, not normal behavior. Write down the macOS version, the app, the microphone in use and what you were saying when it stopped. Those details separate a problem in one app from a problem across the whole Mac. The full checklist for every failure is in why Mac dictation is not working, and how to fix it, and the general answer for all devices is in why dictation keeps stopping.

For the shortcut side of a stop, see why the Mac dictation shortcut is not working. The overview of the feature is in how to use Dictation on a Mac, which is part of our guide to Dictation on Mac.