Make Mission Control open instantly on Mac

If you hit Mission Control dozens of times an hour, even a fifth of a second of zoom animation adds up to a stutter you feel all day. There is no Settings toggle for it, but one hidden Dock key controls the speed. Drop it to near zero and the overview appears the instant you trigger it — no zoom, no wait.

Set it to near-zero

The key is expose-animation-duration and it lives in the Dock's preferences. For a fast-but-still-legible feel, 0.1 seconds is the sweet spot:

# Near-instant Mission Control
defaults write com.apple.dock expose-animation-duration -float 0.1
# Restart the Dock to apply
killall Dock

Trigger Mission Control and the overview is essentially there before you finish the gesture. To go back to the stock speed, delete the key rather than guessing at the default — that restores exactly what macOS shipped with:

# Undo — restore the default animation
defaults delete com.apple.dock expose-animation-duration
killall Dock

This holds on macOS 13 Ventura, 14 Sonoma, and 15 Sequoia.

0 or 0.1? The difference matters

You can push the value all the way to zero for a truly instant, cut-style transition. Whether that is better than a whisper of animation is a matter of feel:

• 0.1 — the overview snaps in with just enough motion for your eyes to follow where windows went. Fast, and easy to track.
• 0 — completely instant, no animation. It is the fastest possible, but the hard cut can be slightly disorienting because nothing shows your windows travelling to their thumbnails.

Most people who want "instant" actually prefer 0.1 once they try both — it reads as immediate without losing the sense of where things moved. Try each with a quick re-run of the command; switching costs nothing.

The same speed everywhere

This key also drives App Exposé and Show Desktop, so all of Exposé feels equally instant once you set it. If part of what makes Mission Control feel slow is reaching for it, pair the faster animation with a quicker trigger — a corner of the screen. See how to set up hot corners on Mac to open the overview by shoving the pointer into a corner.

Want fewer animations overall?

If instant Mission Control is part of a wider wish for a quiet, motion-light Mac, the accessibility switch does that system-wide. See how to reduce motion on Mac to replace zooms and slides with simple fades.