Using a Mac as a Teleprompter Screen: Script on the MacBook, Keyboard and Trackpad Locked

If you record talking-head videos on a phone or a camera, the script has to live somewhere you can read it without looking away from the lens. A Mac behind the phone does that job well, with one catch: it is a computer, and computers react to touch. This post walks through the setup and how VibeLock turns the Mac into a screen that shows your script and ignores everything else, including the one trade-off to know before the first take.

Why a Mac makes a good teleprompter screen

A phone screen is too small to read from a sensible framing distance, and a dedicated prompter rig is one more thing to buy and carry. A Mac fills the gap: a big, bright display you already own, a keyboard for last-minute edits, and any teleprompter web page or plain text document at whatever font size you like. Placed directly behind the phone at lens height, the gap between where you read and where the lens is stays small enough that viewers see you looking at them.

The problem: a computer under your script

• A key press moves the script. Space, arrows and Page Down all scroll a document or a web page; a knuckle on the keyboard and your place is gone.
• The trackpad is in the way. A cable laid across it or a sleeve: something scrolls, closes or comes to the front mid-sentence.
• The display sleeps. A take with no input is exactly the idle window macOS uses to dim and blank the screen.
• A helper fixes something. Whoever is holding the reflector tidies a window, and the script is suddenly a desktop full of email.

The setup

Put the Mac at eye level directly behind the phone or camera, as close to the lens line as the tripod allows. Then:

1. Put the script on screen. A plain text document in Pages, TextEdit or Notes at a large font works, and so does a browser tab with a web-based teleprompter page or a teleprompter app. Close that app's other windows; VibeLock shows every window of an app you allow.
2. If the page auto-scrolls, start it before locking. VibeLock blocks your input, not the page's own behaviour, so a scroll the page drives itself keeps running while locked. Set the speed, press play, lock while the first lines are still on screen.
3. Start VibeLock with the script app in the allowlist. Click the lock icon in the menu bar, open Visible While Locked, tick the app showing your script and untick the pre-allowed developer tools. Leave Accessible While Locked empty. Choose Lock. On the very first lock macOS asks for the Accessibility permission, which the setup guide covers.

What you now see is the script and nothing else: every other app is hidden behind an opaque backdrop, the desktop is covered, and the display is held awake for as long as the lock is on.

What VibeLock changes, and what it does not

While locked, a system-wide event tap swallows every key press, click, scroll and drag before any app sees it. Apps not on your Visible While Locked list are hidden and kept hidden, Spotlight, Force Quit and ⌘Q are blocked, and the display stays on. A stray key or click raises VibeLock's unlock shield rather than touching the script; press Esc and the shield drops with the script exactly where it was. You unlock with Touch ID, or by typing your Mac login password into the shield. VibeLock is a $10 one-time purchase for macOS 13 Ventura or later, makes no network calls and needs only the Accessibility permission.

The part to be clear about: VibeLock cannot scroll for you while it is locked. Scrolling is input, and input is what it blocks. So this suits two kinds of script and not a third:

• One-screen scripts. A 30- to 90-second piece fits on a 13-inch display at a readable size. Lock, record, done.
• Auto-scrolling pages. A teleprompter page or app that scrolls on its own timer keeps going while locked, because the page is moving itself. Start it, lock, record.
• Manual scrolling mid-take. If you need to nudge the script by hand while the camera rolls, VibeLock is in your way; the take-by-take workflow below is the workaround.

A workflow for several takes

1. Lock with the first section of the script on screen and record it.
2. Stop recording, then touch the Touch ID sensor (or press any key and type your Mac password into the shield) to unlock.
3. Scroll to the next section, or reset the auto-scroll to its start.
4. Lock again from the menu bar and record the next take.

Touch ID takes about a second, and everything returns exactly as you left it on unlock, so the script keeps its position and zoom.

Eye-line tips

• Keep the live lines near the top of the screen. The lens sits above the display, so the closer your eyes are to the top edge, the closer they are to the lens. Use a large top margin or scroll so the line you are reading sits in the upper third.
• No mirroring needed. You read the screen directly, not a reflection, so leave any mirror option off.
• Turn on a Focus and plug in. Notification banners are drawn by macOS, not by the hidden apps, so they can still appear over the script. And VibeLock keeps the display awake but does not stop the Mac sleeping on an empty battery or a closed lid.

When not to do this

• You must scroll by hand mid-take. Long monologues where you adjust pace as you go need an auto-scrolling page or an unlocked Mac. There is no way to let one key through.
• You present live and switch apps. Alternating between script, slides and chat needs an unlocked machine, or an app marked Accessible While Locked, which brings the trackpad risk back for that app.
• The Mac is your capture device. Starting and stopping a recording app is exactly the click a locked Mac blocks. Record on the phone and let the Mac be the screen.

Alternatives, briefly

• Close the lid, or the macOS lock screen. Both block the keyboard perfectly and turn the screen off, which defeats the purpose.
• Keynote presenter display or a slideshow. Hides the rest of the Mac and reads well in a large font, but a key press still advances or exits the show. It pairs well with VibeLock, as the classroom projector post describes for slides.
• A tablet with a teleprompter app. Lighter and easier to mount close to the lens; the trade-off is a smaller screen and another device to charge and carry.

Questions people ask

Will an auto-scrolling teleprompter page keep moving while locked?

Yes. VibeLock blocks input from you, not what a visible app does on its own; the keep video playing while locked post describes the same behaviour for video. You cannot pause or speed it up until you unlock.

Does a knocked key ruin the take?

It shows the unlock shield over the script, so you will notice, but nothing scrolls, closes or types. Press Esc and the script is back where it was: a retake, not a lost script.