Soften the corners.
What it does
Rounder draws borderless corner overlays above the desktop, then gets out of the way. Settings stay local, and everything lives in the menu bar.
No permissions
No Accessibility permission, Screen Recording, Automation, or network access.
Live tuning
Radius, color, corner selection, presets, and glow changes apply while running.
Multi-display
Choose which displays get rounded and keep external monitor desks consistent.
Under the hood.
Engineering
The overlays sit above the menu bar and Notification Center, so the very edge of the screen rounds cleanly.
Clicks pass through
The overlays ignore mouse events. Menus and buttons under the corners keep working.
Survives fullscreen
Corners stay attached across Spaces, desktop switches, and full-screen apps.
Draws only the corners
Four tiny windows instead of a full-screen sheet, with paths cached for low CPU use.
Follows your displays
Recalculates positions when the resolution changes or displays are plugged in.
Nothing leaves this Mac.
Privacy
Nothing. No telemetry, analytics, or crash reports.
Settings live in local macOS UserDefaults — radius, colors, corners, and presets.
No network access.
None — including Location, Camera, and Microphone.
Small app. Specific job.
Controls
Pick the displays, radius, shape, and corners you want.
Use presets for subtle corners, all corners, or gaming glow setups.
Keep it in the menu bar. No Dock icon after setup.
Changelog.
Recent releases
Better Space-transition handling, tag-driven CI builds, safer preset serialization, and gaming-glow rendering fixes.
Fixed corners appearing on only one side during Space transition animations.
Improved overlay recovery when entering fullscreen Spaces.
Install once.
Install
Download the latest release and move Rounder.app to Applications. The app is unsigned, so Gatekeeper asks once on first launch — right-click and choose Open.