cd /news/open-source/show-hn-i-reverse-engineered-apple-s… · home topics open-source article
[ARTICLE · art-8772] src=github.com pub= topic=open-source verified=true sentiment=↑ positive

Show HN: I reverse engineered Apple's video wallpapers

The author reverse-engineered Apple's video wallpaper system to create Phosphene, an open-source tool that allows custom videos to play continuously on the macOS desktop (not just the lock screen). The tool uses the WallpaperExtensionKit.framework and includes a companion app for adding videos, while intelligently managing playback based on thermal state, battery, brightness, and window occlusion. The project was initially intended for sale but was open-sourced due to strong existing competition.

read1 min views4 publishedMay 20, 2026

Ever since Apple introduced their video wallpapers I wanted to be able to put custom videos there. I decided to reverse engineer and see what I can do. I built Phosphene to sell it, but the existing competitors were polished enough that the time it would have taken to catch up wasn't going to pay off. So I'm open-sourcing it. WallpaperExtensionKit.framework is what powers macOS wallpapers. It controls what’s shows in the Settings app. It took a lot of trial and error to replicate the behavior, but the result is that your custom wallpapers appear alongside everything else. I wanted to have an “add” button there too, but I couldn’t find a way to do so, so there’s a companion app that will put your video where it needs to be. Unlike Apple's Aerials, the video keeps playing on the desktop (not just the lock screen). The renderer drives AVSampleBufferDisplayLayer directly with PTS-offset gapless looping, and s or downshifts based on thermal state, battery level, brightness, and window occlusion. It’s free and works well.

Comments URL: https://news.ycombinator.com/item?id=48215979
Points: 411
── more in #open-source 4 stories · sorted by recency
sponsored brought to you by zahid.host 4,200+ EU-deployed projects
reading about agents? ship yours in a single git push.

Run your AI side-project on zahid.host

EU-based hosting, git-push deploys, automatic HTTPS, no cold starts. Free tier with a custom domain — perfect for shipping the agent you just read about.

$git push zahid main
Live at https://your-agent.zahid.host
Get free account → Pricing
from €0/mo · no card required
LIVE [news/show-hn-i-reverse-en…] indexed:0 read:1min 2026-05-20 ·