You can find official release themes and community proposals on the Debian Wiki Artwork page .

Platforms like Wallup.net provide a wide range of selectable resolutions, including the specific 2880x1800 format. Technical Context DebianDesktop/Artwork - Debian Wiki

At 2880x1800 pixels, it is specifically optimized for Retina displays , ensuring no blurriness or scaling artifacts on high-DPI screens.

High-resolution versions (up to 4K) are frequently shared on r/debian or hosted on GitHub for open-source use.

The search for points to a specific high-resolution background, likely designed for MacBook Pro Retina Go to product viewer dialog for this item.