Keynote can be shared with people in a video call or captured as part of a public live broadcast, but those are different workflows. Decide which audience you are presenting to, prepare the deck for the appropriate playback mode, then check the audience view before you begin.
On a Mac, windowed playback is often convenient when you can select the slideshow window to share or capture. It is not a universal guarantee: conferencing apps and macOS setups differ, so verify the selected display and what appears in the preview, especially if you use presenter notes.
Choose the right workflow for your audience
A video call is a conversation with invited participants. You use the call app’s screen-sharing controls, and may want to see participants or use presenter controls while you speak. A public broadcast is a composed scene sent to a wider audience. With OBS, for example, Keynote is one source in that scene; you decide how it is framed and whether other elements, such as a camera or title, appear alongside it.
| Question | Video call | Public broadcast |
|---|---|---|
| Who watches? | Participants in the call | Viewers of the live channel |
| What selects the content? | The call app’s Share controls | The broadcast scene and its capture source |
| Typical capture choice | Keynote window, if available, or a display | Keynote window, app, or display in OBS |
| What needs a privacy check? | Shared screen area and presenter display | OBS source, scene preview, and any other visible desktop content |
If you are teaching a small group and want discussion, share through the call app. If the slides are part of a scheduled public programme, you need a broadcast workflow instead. A deck intended to run continuously is a different production task from advancing slides in a live presentation; see the guide to making a 24/7 exam revision stream for that kind of channel.
Neither route makes the other obsolete. A call can be useful for rehearsing and interacting; a broadcast scene gives you control over the programme’s visual layout. Avoid treating a call app’s share menu as if it were the same thing as an OBS source selector. They capture content at different stages and have different previews.
Prepare the deck and choose a playback mode
Before opening a call or broadcast, review the deck as a viewer would see it. Check slide order, spelling, embedded media, and whether text remains readable at the size you plan to show. If a slide includes a link, notification, or other material that should not appear on air, remove it or make sure it is not exposed during the presentation.
On Mac, Apple Keynote supports windowed and full-screen playback. Apple’s instructions for presenting a slideshow in a video conference describe choosing Play > In Window or Play > In Fullscreen, then starting playback with Play > Play Slideshow. Windowed playback leaves you more access to other Mac information while presenting, but that convenience also makes it important to share or capture only the intended window. Full-screen playback may suit a separate display or a workflow built around showing one display; it can be awkward if you need to switch among apps on the same display.
Try the playback mode that matches the actual sharing arrangement, not simply the one that looks best on your laptop. If the slideshow is windowed, resize it before you share so its content is legible. If you use full screen, confirm which display Keynote occupies and which display the call app or OBS captures. Menu names and window behaviour can vary with the macOS version and setup.
If you use a deck stored in Keynote for iCloud or present from an iPhone, follow the relevant Apple instructions rather than assuming the Mac steps apply. Apple documents separate workflows for Keynote on iPhone and Keynote for iCloud. Those routes change where playback and presenter controls appear, so test the chosen device and browser before using them in a public session.
Share the slideshow in a video call
Start Keynote, select the opening slide, and choose the playback mode you prepared. If you chose Play > In Window, start the slideshow and adjust its window. Then use the call app’s Share menu to select the Keynote slideshow window or the appropriate display. The available choices and their behaviour depend on the particular app and Mac setup; consult that app’s current help if you cannot find the expected window-selection control.
Do not assume that selecting a window behaves identically in every call product. Some apps may offer a window picker, some may share a chosen screen, and the visible controls can change. Apple warns that certain conferencing apps may show the presenter display if it lies within the area being shared. Once sharing begins, look at the app’s audience-facing preview, if available, or ask a participant to confirm what they can see before you move into the presentation.
For a straightforward solo talk, you can advance slides with the left and right arrow keys. Keep the call controls available so you can stop sharing when the deck ends. If you need to speak with participants between sections, plan how you will return to the call without exposing unrelated desktop content. A rehearsal is particularly useful when the presentation includes video, audio, or a hand-off to another speaker.
FaceTime on Mac has a distinct flow: Apple describes choosing Share Slideshow after starting the deck, with the slideshow and presenter display in separate windows. Apple also documents Presenter Overlay on macOS Sonoma 14 or later. Treat these as FaceTime-specific options, not as instructions that apply to every app. If several presenters need to take turns, Apple’s multi-presenter slideshow guidance explains the host’s role and the control given to co-presenters. Agree who advances slides before the session starts.
Capture Keynote in an OBS broadcast scene
For a public broadcast on Mac, add Keynote as a source in OBS rather than using the call app’s share controls. OBS’s macOS Screen Capture documentation describes capturing a display, an application, or a window. For a presentation, select the narrowest source that reliably contains the slideshow. A window source can reduce the chance of showing unrelated desktop areas; capturing a display can be appropriate when the presentation spans a full screen or needs other visible content, but it requires closer review.
A practical sequence is to open the deck, start its slideshow, add the corresponding macOS Screen Capture source in OBS, and place it in the intended scene. Resize and position the source so the slide is framed correctly. If your programme uses other sources, such as a camera or a title panel, check that they do not cover slide text. OBS’s source list and canvas are production controls; viewers see the composed scene, not the source controls themselves.
OBS requires macOS Screen Recording permission to capture displays, apps, or windows. Its macOS permissions guide explains that permission, along with separate permissions for camera and microphone sources. Grant only what your planned scene needs, and if you change permissions, follow the current OBS guidance about restarting or reselecting the source. Do not troubleshoot a blank capture by assuming Keynote itself is at fault; first check the selected source and macOS permission.
Audio needs its own check. OBS documents audio capture with the macOS Screen Capture source on macOS 13 and later; its documentation describes capture without audio on macOS 12.3–12.6. Check the current OBS guide and your own OS version before relying on this for embedded video or slide audio. For narration, confirm that the intended microphone source is active and that its level is sensible. A silent slide deck may be fine for a presentation with a separate mic, but a clip with audio will not be represented correctly if the capture path does not include that sound.
OBS’s Quick Start Guide recommends testing settings before a first stream. Use that test to check framing, audio, and the scene transition you plan to use. This is a workflow check, not a promise that a broadcast will remain connected or that platform settings are correct. If you are also configuring YouTube, use the always-on OBS stream-key checklist for the separate platform setup, and verify the current YouTube instructions for your channel.
Keep notes and desktop content private
Presenter notes are for you, not automatically for viewers. Keynote’s presenter display can show notes and the next slide separately from the slideshow, but privacy depends on what the call app shares or what OBS captures. If the presenter display sits inside the shared area or selected capture, it may be visible. Do not rely on a setting alone as proof that notes are hidden.
Apple’s Mac guidance says you can open the presenter display and, in Keynote > Settings > Slideshow, turn off Show presenter display window in other applications. That setting can help prevent the presenter display appearing in other apps, but Apple also notes that some conferencing apps may show it if it falls within the shared screen area. Keep the presenter display outside the selected region where possible and verify the audience view after sharing starts.
Before a session, close or move private documents, messages, email, and browser tabs that should not appear. Turn off notifications if they could interrupt the presentation, and avoid switching to an unprepared desktop while live. These habits matter even when you intend to share a single window: a missed selection, a changed capture source, or an accidental screen share can reveal more than the slides.
For a public broadcast, inspect the OBS preview after every scene or source change. Check that the scene contains the expected slide window and not the Keynote editing interface or presenter notes. If another person is operating the stream, agree on a simple cue for pausing or changing scenes if something private appears. A modest rehearsal is easier than correcting an exposed screen in front of viewers.
Preview what the audience will see
The audience view is the final test, not the presenter’s desktop. In a call, use the app’s preview or ask someone in the call to confirm that the slide is readable and notes are absent. In OBS, inspect the programme preview, then make a short local test recording if you need to check exactly what the composed scene contains. The preview should show the same framing, overlays, and other sources that you intend to broadcast.
Check the first slide, a slide with the smallest text, any transition, and any embedded video or sound. Look for black margins, clipping, unexpectedly tiny content, or controls overlapping the presentation. If you are sharing a full display, verify that moving the cursor or opening a menu does not reveal desktop content you had not intended to show. If the setup includes more than one display, confirm which one Keynote uses and which one is being captured.
It can help to run through the start and end of the presentation once, including the moment you begin sharing and the moment you stop. In a call, make sure the audience sees the slideshow rather than a presenter display. In OBS, make sure the selected source remains the correct window and that the scene returns cleanly to whatever follows. For a scheduled channel, a test should also fit into your wider stream plan; the guide to running prerecorded store ads on YouTube Live covers planning a different kind of loop content.
If a preview differs from what you expect, stop and correct the source, display, or permission before going live. Do not infer privacy from the fact that the slide looks right on your own screen. The share or capture preview is where you can catch a wrong window, notes, or a poorly framed slide while there is still time to fix it.
Choose a workflow that fits repeated broadcasts
For a one-off talk, manual playback gives you direct control over pacing and lets you respond to questions. For a recurring lesson or devotional session, you may instead need a prepared programme that continues after you have left the desk. That changes the operational question: it is no longer only how to show a Keynote window, but who starts and monitors the broadcast, how the presentation repeats, and what viewers see between sessions.
If your format is a presentation delivered live, keep a person responsible for advancing slides and watching the stream. If the programme is a pre-recorded deck narration or a repeated lesson, plan a finished video or another suitable playback workflow and check that it reflects the content you intend to publish. Keynote’s presentation controls are not themselves an always-on channel plan.
When a public channel depends on a prepared file continuing without your Mac left open, StreamNeo can remove the specific burden of keeping the presentation computer running: upload the video, provide the YouTube stream key, and the broadcast runs while your computer is off, with monitoring and automatic restarts if it drops. It is YouTube-only, and it is for a prepared video rather than a live operator advancing Keynote slides. If your programme needs interactive slide control, use the live computer-and-OBS workflow instead.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
Can I share Keynote in Zoom or another video call?
Yes. Start the slideshow, then use the call app’s Share controls to select the slideshow window or the relevant display if the app offers it. The exact controls vary, so preview what participants see and check the app’s current instructions.
How do I keep Keynote presenter notes private?
Keep the presenter display outside the shared or captured area and check the audience-facing view before presenting. Apple offers a slideshow setting to prevent the presenter display appearing in other apps, but do not treat it as a guarantee if the display is within the selected area.
Can OBS capture a Keynote presentation on a Mac?
OBS’s macOS Screen Capture source can capture a window, application, or display, so it can be used to bring the slideshow into a scene. macOS Screen Recording permission is required; check audio capability against your OS version and the current OBS documentation.
Do I need a capture card to show Keynote in OBS?
Not for the documented Mac screen-capture workflow. OBS can capture the display, app, or window directly; choose the source that fits your scene, then inspect the preview before broadcasting.