Fake macOS Update
The fake Mac update prank throws up the black macOS install screen: Apple logo, a thin progress bar inching across, and the unspoken instruction every Mac owner obeys: never touch this. Open it on their Mac, go fullscreen, and disappear.
Press F11 for maximum realism. Tap or press Esc to exit.
For the best results, add this to the device's home screen. It then opens with no address bar, no tabs and no URL, so there is nothing left to give it away.
Mac users are especially easy here, because macOS updates genuinely do take an age and genuinely do warn you not to interrupt them. On a PC instead? Use the fake Windows update. Want something that looks broken rather than busy? The fake kernel panic is the Mac equivalent of a crash screen.
How to use the fake macos update prank
- On the Mac, open this page in Safari, Chrome or Firefox and save anything open in other apps.
- Click Launch Full-Screen Prank. If the menu bar or toolbar still shows, press Ctrl + Cmd + F.
- Slide the pointer to the bottom of the display, away from the top edge where the menu bar lives.
- Leave the Mac open on the desk with the progress bar already moving.
Setting up the fake Mac update on a MacBook or iMac
The Launch button asks the browser to fill the screen, which hides the Dock, the menu bar and the Safari toolbar. If the pointer drifts to the top of the display, macOS slides the menu bar back down, so leave it low.
While it runs, the page asks the display to stay awake. Safari 16.4 and later and current Chrome support that. On an older Safari the screen may dim on its usual schedule, which looks less like an install in progress.
What the fake macOS update screen shows
A black screen, a white Apple logo and a thin progress bar. There is no percentage and no text. The bar fills to about four fifths in under a minute, then slows right down and stops just short of the end after roughly two and a half minutes. It never finishes.
A real macOS install often shows a "minutes remaining" line under the bar. This one does not, so it works best seen from a step or two away. Nothing installs and the Mac does not restart.
How the fake Mac update ends
Any click ends it, including a tap on the trackpad, and so does Esc or leaving full screen. That means the joke usually lasts until the person touches the Mac. The pause before that touch is the part to watch for.
Once it closes, this page is back and every app is where it was.
When to leave the fake Mac update alone
Skip it on a work Mac managed by IT, where a stuck update can turn into a support ticket, and on a Mac someone is about to present from. The one real risk is a person holding the power button to force a restart, which loses unsaved work in other apps, so stay nearby. If you want a screen that looks broken rather than busy, the fake kernel panic is the Mac crash version.
Frequently asked questions
Is this a real macOS update?
No. It's a harmless web page mimicking the macOS install screen. Nothing is downloaded and nothing on the Mac changes. Close the tab and macOS is exactly as it was.
How do you prank a Mac user with a fake update?
Open this page in Safari or Chrome on their Mac, press ⌃⌘F for fullscreen (or F11 on an external keyboard), and step away. The Apple logo and progress bar auto-play, so there's nothing to trigger once you've left.
How do you exit the fake macOS update screen?
Click anywhere on the screen or press Esc, then close the tab. There's no restart or recovery step, because nothing was ever installing.
Does the progress bar ever finish?
No. It creeps most of the way across and then stalls, which is how a real macOS install often feels right before you start worrying. The wait doing the work is the joke.
Will it fool someone on a MacBook with a notch?
Yes. The screen is plain black with a centered logo, so it fills the display cleanly on any modern MacBook, iMac or external monitor regardless of the notch or aspect ratio.
Can I get in trouble for using it?
The page itself is harmless and legal. Trouble comes from the setting: leaving it running on a Mac someone needs for work, or on managed company hardware where IT may open a ticket over a "stuck update". Keep it to people who'll see the funny side, and reveal it quickly.
Does the fake Mac update work on iPhone or iPad?
It loads, but the layout is a desktop install screen. For an iPhone or iPad use the fake iOS update, which mimics the actual Software Update screen those devices show.
How do I make it more convincing?
Go fullscreen before handing the Mac over, because a visible Safari toolbar ruins it instantly. Dimming the display slightly and setting it down rather than passing it directly sells the "I left it updating" story better than presenting it to someone.