See seconds in the Mac clock for precise timing

When you're running a task against the clock — a timed writing sprint, a 90-second plank, a pour-over that needs to bloom for exactly 30 seconds — a display that only shows hours and minutes leaves you guessing. Adding a seconds counter to the menu-bar clock gives you a live, glanceable count in the corner while your hands stay on the work.

Turn on the seconds counter

1. Open System Settings → Control Center.
2. Scroll to the Clock section and click Clock Options.
3. Switch on Display the time with seconds.

The clock updates the moment you flip it, and the counter is accurate to the second on macOS 13 Ventura, 14 Sonoma and 15 Sequoia alike. Because it lives in the menu bar, it's always on top of whatever app you're in — no second window to keep visible, no timer app stealing focus while you're mid-task.

Or flip it from Terminal

Prefer to set it once and move on? The preference has a direct name. Write it, then reload the menu-bar process so the change shows:

# Add a live seconds counter to the clock
defaults write com.apple.menuextra.clock ShowSeconds -bool true
killall ControlCenter

When you're done with a stretch of timed work and want the calm of a minute-only clock back, reverse it:

# Undo — remove the seconds counter
defaults write com.apple.menuextra.clock ShowSeconds -bool false
killall ControlCenter

How to actually time with it

The trick is to treat the counter as a reference point, not a stopwatch. It shows the current time to the second; it won't count down or measure elapsed time on its own. So the workflow is: note the second you start, add your interval in your head, and watch for that mark. Starting on a round number makes the math trivial — begin your two-minute set at :00 and you're just waiting for the same seconds to come around again with the minute rolled forward.

A few situations where this beats reaching for a timer app:

• Focus sprints. Glance up to see how much of a 25-minute block is left without breaking flow to check a Pomodoro window.
• Kitchen and coffee. Time a bloom, a steep or a rest when your phone's across the room and your hands are full.
• Interval work. Pace short sets — planks, sprints, breathing rounds — off a clock that's already on screen.
• Live handoffs. Know precisely when the top of the minute hits before you unmute or hit record.

For anything that needs laps, alerts or a running total, the Clock app's stopwatch is the right tool. But for the constant, low-friction "what second is it?" that timed work runs on, a ticking menu-bar clock earns its place — and if you also want the colon to blink each second so a glance registers even faster, that's a companion setting worth pairing with it.

Hear the time as well as see it

If you'd rather not keep glancing up, your Mac can speak the hour on a schedule. See how to make your Mac announce the time to pair an audible cue with your visible seconds.