Limelight
What is a Retina Display?
A Retina display is Apple's term for a screen with pixel density so high that, at a normal viewing distance, individual pixels are hard to see and the image looks very sharp.
Retina display is Apple's marketing name for its high-density screens, used on many Macs, iPhones, and iPads. The idea is that the pixels are packed densely enough that your eye cannot pick out individual dots, so text and graphics appear smooth and crisp.
A Retina display is not simply about total resolution; it is about pixel density relative to how close you sit. macOS handles this by rendering the interface at a logical point size and drawing each point with multiple physical pixels, which keeps everything sharp without making controls tiny.
Limelight is a native macOS app built with SwiftUI, so it draws correctly on Retina displays. Its cursor spotlight, on-screen keystrokes, and freehand annotations render at full pixel density, staying crisp in presentations and recordings on Retina Macs.
Why Limelight
- ▸Retina is Apple's name for high pixel-density displays
- ▸Pixels are too small to see at a normal viewing distance
- ▸macOS draws each interface point with multiple physical pixels
- ▸Limelight is native SwiftUI and renders crisply on Retina screens
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FAQ
- Is a Retina display the same as 4K?
- Not exactly. Retina refers to high pixel density relative to viewing distance, while 4K is a specific resolution. A Retina screen may or may not be 4K.
- Does Limelight look sharp on a Retina Mac?
- Yes. Limelight is a native SwiftUI app that renders at full pixel density, so its overlay stays crisp on Retina displays.