How to Add a Timer to Keynote (Mac)

Does Keynote have a built-in timer?

Yes — but it's a timer for you, not for the room. When you play a presentation, Keynote's presenter display appears on your own screen with your current and next slides, your presenter notes, and a clock area. In the presenter display options you can switch that clock between the time of day, an elapsed timer that counts up from when you started, and a countdown you set to a fixed length (handy if you rehearse to a target time). This is the same timer you see in Rehearse mode.

The important limitation is what it can't do. The presenter display lives only on your screen — the audience sees the clean full-screen slideshow, with no clock and no countdown. Keynote also can't float that timer over other apps. So if your goal is a big countdown the whole room can see, the built-in presenter timer alone won't get you there. That leaves two honest options: embed a countdown clip on a slide, or use an overlay timer.

How to add a countdown to a Keynote slide

The most reliable way to show the audience a countdown today is to drop a pre-rendered countdown movie onto the slide where you need it. Keynote plays embedded video on the slide during the slideshow, so the clip counts down in full view of the room.

1. Insert a countdown video clip. Go to the slide, choose Insert ▸ Choose…, and add a countdown movie file (for example a "5-minute countdown" clip you've saved). Resize and position it where you want the timer to appear.
2. Set it to play. Select the clip, open the Format ▸ Movie inspector, and choose how it starts — on click, or automatically when the slide appears — so it begins counting as soon as you reach that slide.
3. Present. Play the slideshow. The clip runs on that slide and the audience watches it count down.

Show a timer with an overlay

An overlay timer takes a different approach: instead of living inside the slide, it's a separate always-on-top window that floats above the full-screen slideshow. Because it sits on top of Keynote rather than inside the deck, it stays visible across every slide, and you can pause, reset or add time live — exactly what an embedded clip can't do.

Here's the honest platform picture, because this guide is for Mac users:

• On Mac, the native overlay is in development. SlideTimerApp is currently a Windows app, and a native macOS version that floats over Keynote is on the way. If that's what you want, join the Mac waitlist and we'll email you the moment it's ready — no fixed date yet, so we won't pretend otherwise.
• On Windows, you can use SlideTimerApp now. If you also present from a Windows PC (for example with PowerPoint or Google Slides), the free overlay already works there. Download it free — it's about 3 MB, transparent, always-on-top, and works offline.

Until the Mac build lands, the embedded-clip method above is the practical way to put an audience-visible countdown in a Keynote deck on macOS.

Presenter timer vs embedded clip vs overlay

Three approaches, three trade-offs. The presenter timer is built in and private to you; the embedded clip is audience-visible but rigid; the overlay is flexible and audience-visible but, on Mac, still on the way.

If you just need to pace yourself, the built-in presenter timer is enough. If the room needs to see the clock, embed a clip today — and get on the Mac waitlist for the overlay that does it across the whole deck.

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