Use Your Mac as a Digital Photo Frame: Slideshow, Screen On, Keyboard and Trackpad Locked

An old MacBook, or the one on the kitchen counter that nobody is using for the evening, makes a far better digital photo frame than the plastic ones sold for the purpose: a bright, colour-accurate screen, your actual photo library, and a slideshow engine already built into macOS. The problem is never the slideshow. It is everything around it: a guest taps the trackpad and the slideshow stops, a child finds the Dock, the display goes to sleep after ten minutes, and the “frame” turns into an unlocked computer with your email one click away. This guide sets up the slideshow properly, keeps the display awake, and then locks the keyboard and trackpad so the frame stays a frame.

Step 1: pick the slideshow source

macOS gives you three decent options and they suit different situations.

• Photos app slideshow. Select an album or a set of photos in Photos, then use the Play Slideshow command (in the File menu, or by right-clicking the selection). You get transitions, optional music and a loop option. Best when you want a specific album for a specific evening: the holiday, the wedding, the year.
• The screen saver. In System Settings, under Screen Saver, choose one of the photo styles and point it at an album or a folder. It starts on its own after the idle time you set, which is convenient, but by design it ends the moment anyone touches a key or the trackpad, so it only works as a frame if nobody can touch either. That is the case we solve below.
• A browser or a dedicated app in fullscreen. A shared web album, a cloud photo service’s slideshow mode, or a photo-frame app from the App Store, run in a fullscreen window. Best when the photos live outside your Photos library, or when several people contribute to a shared album and you want new pictures to appear without touching the Mac.

Whichever you choose, start it, let it run for a minute, and check that it loops. A slideshow that ends on the last photo and drops back to the desktop is the most common way a frame stops being one.

Step 2: keep the display awake

By default a Mac dims and sleeps its display after a few minutes of no input, and a photo frame produces no input. You can push the display sleep timer out in System Settings under Displays or Lock Screen (the exact location has moved between macOS versions), or run a caffeinate command in Terminal, but both are easy to forget to undo and neither helps with the next problem. Plug the Mac in; a slideshow at full brightness for an evening is more than a battery wants to give.

Step 3: lock the keyboard and trackpad, leave the screen on

This is the step the built-in tools do not cover. The macOS lock screen blanks the display, which is the opposite of what a frame needs. Closing the lid sleeps the Mac. Hiding the keyboard under a tea towel does not stop a cat. What you want is the slideshow visible and running, every key and every tap ignored, and every other app out of reach.

VibeLock does exactly that. It is a small native menu bar app for macOS 13 Ventura or later. When you lock, a system-wide event tap swallows keys, clicks, scrolls and gestures; every app except the ones on your visible list is hidden and kept hidden; Spotlight, Force Quit and ⌘Q are blocked; and the display is held awake for as long as the lock is on, so you can leave the sleep settings alone. To get back in, use Touch ID or type your macOS login password into VibeLock’s own shield; it is verified locally through macOS and nothing is stored or sent anywhere.

For a photo frame the setup is: start the slideshow, add Photos (or your browser, or the frame app) to the visible list from the menu bar, leave the accessible list empty so nothing can be typed into, and lock. The slideshow carries on exactly as it was. A tap on the trackpad does nothing. A child mashing the keyboard does nothing. The screen stays on until you unlock, and when you do, every hidden app comes back where it was.

A note on the screen saver route from step 1: a screen saver is designed to exit on any input and to interact with the system’s own idle and sleep logic, so how it behaves while a third-party lock is holding the display awake is not something we would promise. For a frame that must keep going all evening, the Photos slideshow or a fullscreen frame app on the visible list is the predictable choice.

What a guest can still do

Honesty about the edges, because a frame on a sideboard gets poked. The pointer may still move when someone drags on the trackpad, which looks alarming and does nothing. Media, volume and brightness keys are system events the input tap does not catch, so someone can turn the brightness down or the slideshow music up. A short press of the power or Touch ID button can sleep or lock the Mac; macOS handles that itself. And closing the lid sleeps the Mac: VibeLock holds the display awake but does not override lid-close sleep. If the frame lives where small hands reach the lid, put the Mac on a stand, or drive an external display or TV with the lid closed and the Mac plugged in behind the furniture. None of these let anyone into your files; they can only make the frame go dark, and unlocking brings it back.

A few frame-specific tips

• Make a frame album. A curated album of a few hundred photos beats the whole library, which inevitably surfaces the screenshot of a parking ticket between two wedding pictures.
• Turn on Do Not Disturb or a Focus. Notifications will still appear over a slideshow for apps on the visible list; a Focus keeps the message previews off the frame while guests are looking at it.
• Dim the room, not the screen. Photos look best with the display at a moderate brightness in a dimmer room; full brightness in a bright room looks like a laptop, not a frame.
• Mute unless the music is the point. A slideshow with music loops the same track for hours. Mute before locking, or choose a long playlist.
• Unlock before you move it. Carrying a locked MacBook is fine, but if you close the lid to carry it, it sleeps; unlock, close, move, reopen, lock again.

When the real lock screen is the better choice

A locked-with-screen-on frame is for places you can see: a living room during a party, a kitchen during a family weekend, a reception desk. If the Mac is going to be out of sight for hours in a place where you do not know who walks past, use the normal macOS lock screen instead; a dark screen reveals nothing, costs nothing, and is the right default for an unattended machine in public. The same reasoning applies to the video-playing case and the demo loop on a booth: keep the screen on when people are meant to look at it, and blank it when they are not.

For an evening of photos on the sideboard, though, the combination is hard to beat: a slideshow you already own, a display that stays lit, and a keyboard that nobody, however curious, can use.