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
- October 30, 2026: Stars 5,960 → 6,051, latest release v1.30.1 (October 29, 2026).
- October 28, 2026: Stars 5,940 → 5,960, latest release v1.30.0 (October 27, 2026).
- October 27, 2026: Stars 5,889 → 5,940, latest release v1.29.0 (October 27, 2026).
- October 25, 2026: Stars 5,858 → 5,889, latest release v1.28.0 (October 24, 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
brew install xcodegen # project generationIf you don't write code
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?
Repository: https://github.com/peetzweg/opendisplay. Follow the official instructions in the README of this repository for setup and execution.
Before starting, check which OS we are on and if the necessary tools (e.g., Python, Node.js, Git, Docker) are installed. Install any missing ones step-by-step according to this system.
Create a new, empty folder to work in. Do not touch any files outside this folder and do not delete anything. Tell me what you are going to do in one sentence before running each command.
Tell me what I should see on the screen at the end of each step. If an error occurs, I will paste the error message to you exactly as it is, and we will fix it together.
Related dictionary terms
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. The introductory text was prepared with AI from the repository's own documentation, and this page was machine-translated from the Turkish original · the Turkish version prevails.