Building a macOS screen saver with Kotlin
summary
Builds a native macOS screen saver in Kotlin by exporting a Kotlin/Native XCFramework from a Kotlin Multiplatform project targeting macOS ARM and x86, calling AppKit and NSBundle APIs to load assets and place animated NSImageViews, producing a .saver installer. Hits include a seven‑step rebuild/invalidate dance, migrating NSUserDefaults to the useless screen saver defaults, and a Sonoma bug that leaves legacy screen saver processes alive causing 100% CPU and hundreds of MB RAM unless the process is terminated. Also shows a working Compose renderer.
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chapters (10)
- 0:00Introduction
- 0:30What is a screen saver
- 1:52Creating a screen saver
- 2:42Swift implementation
- 7:00Installing the screen saver
- 8:26Adding more features
- 10:30Customizing images
- 13:24Fixing the problem
- 15:07Summary
- 17:06Questions
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