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Turn your old devices into a second monitor

OpenDisplay is an open-source screen extension tool that turns iPhone or iPad devices into a second monitor for Mac computers. Providing low-latency image transmission via USB or wireless connection, the application offers a free alternative to Apple's own solution, Sidecar.

Updates

  • September 15, 2026: Stars 3,785 → 3,786, latest release v1.19.0 (September 1, 2026).

What you get

  • Use iPhone or iPad devices as a real second screen for Mac.
  • Provide low-latency image transmission via USB cable.
  • A completely open-source solution that does not require a subscription or account.

Installation

Project build tool setup
brew install xcodegen   # project generation

If you don't write code

🤖 Paste this into your AI agent (Claude Code · Codex · Antigravity)

How can I configure my iPhone or iPad as a second monitor for my Mac using OpenDisplay? What are the network permissions and cable type requirements I should pay attention to when connecting my device via wired or wireless connection?

Related dictionary terms

Artificial Intelligence
Who it is forFor Mac users who want to extend their screen space but do not want to be restricted by Apple Sidecar limitations.
LicenseGPL-3.0

Links

TreScout did not build this tool · we found it in GitHub trends and wrote it up. This page describes the repository as of 2026-09-15: The star count and our text belong to that day, the repository may have changed since. Check the repository link for the current state. This page was machine-translated from the Turkish original · the Turkish version prevails.