Turn your Daylight DC-1 into a real-time external display for your Mac.

Your Mac renders natively at the Daylight's 4:3 resolution. What you see on the Mac is exactly what appears on the Daylight — every pixel, every frame, with no perceptible delay.

30 FPS. Under 10ms latency. Lossless. Zero artifacts. This is as fast, as clean, and as efficient as a software display mirror can physically be.

Pay what you want ($5+). The .dmg includes both the Mac menu bar app and the Android APK for your Daylight.

After downloading, drag "Daylight Mirror" to Applications, then install the included APK on your Daylight:

adb install /Volumes/Daylight\ Mirror/DaylightMirror.apk

brew install --cask welfvh/tap/daylight-mirror

adb install /opt/homebrew/share/daylight-mirror/DaylightMirror.apk

https://github.com/welfvh/daylight-mirror/releases/latest/download/DaylightMirror.dmg

adb install /Volumes/Daylight\ Mirror/DaylightMirror.apk

git clone https://github.com/welfvh/daylight-mirror
cd daylight-mirror
make install    # Mac menu bar app → ~/Applications
make deploy     # Android APK → Daylight (requires Android SDK)

On your Mac:

• macOS 14 or later
• adb: brew install android-platform-tools

On your Daylight DC-1 (one-time setup):

1. Settings > About tablet > tap Build number seven times
2. Settings > Developer options > enable USB debugging
3. Connect to your Mac via USB-C and tap Allow on the prompt

Verify with adb devices — you should see your device listed.

On first launch, macOS needs two permissions. The app will guide you through this:

1. Screen Recording — required to capture your display. The app will open System Settings automatically. Toggle "Daylight Mirror" on, then quit and reopen the app.
2. Accessibility — required for keyboard shortcuts (Ctrl+F8, etc.). Same flow: toggle on in System Settings, then reopen.

1. Open Daylight Mirror from Spotlight
2. Pick a resolution (Cozy, Comfortable, Balanced, or Sharp)
3. Click Start Mirror (or press Ctrl+F8)
4. On the Daylight, open the Daylight Mirror app

That's it. Your Mac switches to 4:3, and the Daylight lights up.

Four 4:3 presets, selectable before or during mirroring:

All shortcuts use Ctrl + function keys:

The menu bar also has brightness and warmth sliders, a backlight toggle, resolution picker, and live connection stats.

Click Stop Mirror or quit the app — your Mac reverts to normal instantly.

Every feature in the menu bar app is available from the command line. The CLI talks to whatever engine is running (GUI app or CLI daemon) via Unix domain socket — one engine, two interfaces.

daylight-mirror start                # start mirroring (tells GUI app, or spawns daemon)
daylight-mirror stop                 # stop mirroring
daylight-mirror status               # current state (machine-readable)
daylight-mirror reconnect            # re-establish ADB tunnel

daylight-mirror brightness           # get current brightness
daylight-mirror brightness 200       # set brightness (0-255)
daylight-mirror warmth 128           # set warmth / amber rate (0-255)
daylight-mirror backlight toggle     # toggle backlight (on|off|toggle)
daylight-mirror resolution sharp     # set resolution (cozy|comfortable|balanced|sharp)
daylight-mirror sharpen 0.8          # set sharpening amount (0.0-1.5)
daylight-mirror restart              # full stop + start cycle

This means any script or tool (including AI agents) can control the Daylight programmatically.

What you see above is the Daylight rendering this README, mirrored from the Mac. Every character is pixel-identical to what the Mac displays. There's no JPEG compression, no dithering, no interpolation — just a direct greyscale conversion applied identically on both sides.

This entire project was vibecoded in a single session with Claude Opus 4.6. Starting from "can I mirror my Mac to this tablet?", we iterated through VNC, Python scripts, browser-based streaming, and native rendering — each version dramatically faster than the last — until we hit the physical limits of what a software mirror can do. The result is 10x better than any existing solution for the DC-1: faster, sharper, lighter, and easier to use.

The blog series tells the full story:

• Part 1: The Prototype — from VNC to ScreenCaptureKit
• Part 2: Killing the GPU — zero-GPU pipeline, native Android renderer with ARM SIMD
• Part 3: One Click — virtual display, display controls, menu bar app

Don't have one yet? Use code WELF at buy.daylightcomputer.com/WELF.

If you find this useful, you can support the project.

MIT

The Daylight DC-1 is made by Daylight Computer. This project is not affiliated with Daylight.