Hi dev,
I built MacPeek, a small macOS utility that adds window preview on Dock hover — similar to how Windows shows taskbar thumbnails.
How it works:
- Hover over any Dock icon → live preview popup appears
- Multiple windows → shows a grid of thumbnails
- Click any thumbnail → switches to that specific window
- You can even close individual windows from the preview
Technical details:
- Built with SwiftUI + AXUIElement Accessibility API + ScreenCaptureKit
- Uses CGWindowListCopyWindowInfo for window enumeration
- Parallel capture with Swift TaskGroup for multi-window performance
- ~3MB binary, minimal CPU usage
- Coordinate conversion handles multi-monitor setups correctly (primary screen vs NSScreen.main was a fun bug to fix)
Privacy: No analytics, no network calls except Gumroad/LemonSqueezy license validation. Fully offline otherwise.
7-day free trial, $2.99 lifetime.
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