macOS Update — online tool
Professional full-screen tool for monitor setup and testing. Use it for dead pixel detection, color calibration, or as a soft light source.
macOS Update
Configuration
How to use this tool
1
Select a system
Choose the desired OS version (Windows or macOS) and set the starting completion percentage.
2
Adjust the speed
Set the time it takes for progress to reach 100% to make the simulation look as realistic as possible.
3
Launch the prank
Go full screen and leave the computer. Perfect for harmless pranks on friends or colleagues.
Available on all devices
Screen.Viktoor works in any modern browser. Use it on PC, tablet, or smartphone without downloading apps.
No Ads
No Login
Questions & Answers
How to enable full screen mode?
Click the 'Full Screen' button in the center of the screen. The browser will request permission to enter full screen mode.
Is it free?
Yes, all tools on our site are completely free and available without registration.
Is it safe to use prank screens?
Absolutely. These are just visual effects in the browser that do not make any changes to your system.
Explore other tools
Try other categories of tools available on our service.
