How to create a custom screensaver on MacBook Pro M5 with macOS Tahoe 26.3?

What do you mean by 'custom screensaver'?

Do you mean one that, for example, displays specific images from your Photos library?

Or do you mean you want to write a completely new screensaver that doesn't currently exist, like, for example, the venerable Flying Toasters (if you're old enough to remember that).

For the former, you can do that via System Settings -> Wallpaper -> Screen Saver -> Custom where you can select photos from your library, or a folder of images to display.

For the latter, you'll need a copy of XCode and Apple's ScreenSaver documentation (plus some coding expertise)

Mathias_909 wrote:

How do I make a custom screensaver on my 2025 MacBook Pro M5? I have MacOs Tahoe 26.3.

[Re-Titled by Moderator]

Original Title: Custom Screensaver Mac Tahoe

There are so many issue with wallpapers and screen savers in macOS Tahoe— I would be inclined to stick with a default screen saver and see if you can get that to work as expected...

Use photos as your screen saver on Mac - Apple Support

Camelot wrote:

Or do you mean you want to write a completely new screensaver that doesn't currently exist, like, for example, the venerable Flying Toasters (if you're old enough to remember that).

Ah! The Flying Toasters... thank you for a trip down memory lane :-)