OpenDisplay is a free, open-source way to use an iPhone, iPad, or spare Mac as a true second monitor for a Mac. It creates a virtual display that macOS treats as an extended desktop rather than merely mirroring the main screen. Video is captured and hardware-encoded as low-latency H.264 before being streamed to the receiver. Connections can run over USB for minimal latency or Wi-Fi with Bonjour-based discovery. Retina and HiDPI output preserve sharp text, while touch gestures provide clicking, dragging, and scrolling from the receiving device. The display can rotate between portrait and landscape and rebuild at native resolution. A separate receiver app can also turn another Mac into a network or cable-connected display.

Features

  • True extended-display support
  • USB and Wi-Fi connectivity
  • Low-latency hardware H.264 streaming
  • Retina and HiDPI output
  • iPhone, iPad, and spare Mac receiver support
  • Touch, drag, and scroll input

Project Samples

OpenDisplay Screenshot 1

Project Activity

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Categories

Screen Mirroring

License

GNU General Public License version 3.0 (GPLv3)

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OpenDisplay Web Site

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Additional Project Details

Operating Systems

Linux, Mac, Windows

Programming Language

Swift

Related Categories

Swift Screen Mirroring Software

Registered

1 day ago
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