CornerFix: macOS Window Corner Radius Customization Tool
By
guessmyname
Pure flour-power. Hearty enough to carry you through lunch.
Summary
CornerFix is an injected macOS window sharpener tool that modifies application window corners by injecting a dynamic library (libcornerfix.dylib) into target applications. It allows users to configure window corner radii from 0-24 pixels, replacing the previous display-overlay approach. The tool includes a CLI for live updates via Darwin notifications, per-bundle plist overrides, presets, and works by swizzling private AppKit window APIs. It's designed as a tweak/loader workflow and is not compatible with App Store or hardened apps.
Key quotes
· 4 pulledCornerFix is now an injected macOS window sharpener instead of the old display-overlay experiment.
This rewrite follows the same broad model as apple-sharpener: a small injected dynamic library runs inside target apps and forces standard windows to use a configurable corner radius.
The tool includes a CLI updates shared settings live through Darwin notifications.
Swizzles private AppKit window APIs; tweak/loader workflow—not App Store/hardened-app safe.
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