peetzweg/opendisplay
Free, open-source Sidecar/Duet alternative — use your iPhone or iPad as a true second monitor for your Mac over USB or WiFi. Low latency H.264, Retina HiDPI, touch input.
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From the publisher
README & documentation
Source previewRead the project’s overview, installation instructions and usage examples. The original README is the source of truth.
Turn your spare devices into second monitors for your Mac — free, open source, no subscription. iPhone, iPad, spare Macs, and Android (beta); a Linux sender and receiver are in beta too. A self-hosted alternative to Apple Sidecar, Duet Display, and Luna Display: true extended display (not just mirroring), Retina-sharp, over USB or WiFi, with touch and scroll input. Website · Quick start · How it works · FAQ · Contributing Turning an iPhone or iPad into an external display for a Mac is a solved problem — but every existing option has a catch: doesn't support iPhones at all, and only works on supported hardware pairs. OpenDisplay is the missing option: a free, open-source, no-account, no-dongle way to use the iOS device you already own as a true second display. If you were about to write your own — don't! Contribute here instead; the hard parts (virtual display creation,…
Read the full README ↗ · Preview checked 2026-10-27T11:14:25.125Z
Inside the original README — Document outline
- OpenDisplay
- Why OpenDisplay exists
- Features
- Comparison
- A spare Mac as the display
- FAQ
- Linux sender (beta)
- Linux receiver (beta)
- Third-party projects
- How it works
- Install
- Homebrew (Mac)
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What this repository does
Free, open-source Sidecar/Duet alternative — use your iPhone or iPad as a true second monitor for your Mac over USB or WiFi. Low latency H.264, Retina HiDPI, touch input.
Repository facts
- Owner
- peetzweg
- Primary language
- Swift
- Stars
- 3,721
- Forks
- 254
- Open issues + pull requests
- 142
- License
- GPL-3.0
- Archived
- No
- Default branch
- main
- Created
- 2026-06-10T09:08:00.000Z
- Last push
- 2026-09-06T16:50:54.000Z
Topics and intended use
Owner-supplied topics: duet-display, external-display, ipad, iphone, macos, screen-extension, screencapturekit, second-monitor, sidecar, swift, videotoolbox, virtual-display
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Source and freshness
Source: GitHub. Metadata observed 2026-09-15T06:33:56.302Z. Daily imports are snapshots, not real-time monitoring.
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