Renderd
Download Mac host, Windows viewer Nº 1.0.0

Two files, one for each computer.

Renderd has two parts. The host runs on your Mac and makes the second display. The viewer runs on your Windows PC and shows it. Both are free. The Mac file is 2.2 MB and the PC file is 2.3 MB.

Download

Nº 1.0.0
5 October 2026

SHA256SUMS.txt to check the files. Release notes. Older versions on GitHub.

First run From download to second display Six steps

The first run, step by step.

You do this once. After the PIN, the two computers know each other and connect on their own.

On the Mac

  1. 1
    Unpack and start the host in Terminal, in the folder with the download.
    tar -xzf renderd-host-v1.0.0-aarch64-apple-darwin.tar.gz
cd renderd-host-v1.0.0-aarch64-apple-darwin
./renderd-host
  2. 2
    If macOS blocks it because it cannot check the developer, clear the download flag and start it again.
    xattr -d com.apple.quarantine renderd-host
./renderd-host
  3. 3
    Allow Screen Recording when macOS asks, or in System Settings, Privacy & Security. Then stop the host with Control-C and start it again. macOS applies the permission only after a restart. The host then prints the address of the Mac.

On the PC

  1. 4
    Unzip and run renderd-viewer.exe. If Windows SmartScreen stops it, click More info, then Run anyway. If Windows Firewall asks, allow it on private networks.
  2. 5
    It finds the Mac on its own. If it does not, for example across a VPN or two subnets, give it the address the Mac printed:
    renderd-viewer --host 192.168.1.20:4433
  3. 6
    Type the PIN. The Mac shows a six-digit PIN once. Type it on the PC. The PC's screen is now a display of the Mac. Arrange it in System Settings, Displays.
Checks Before and after SHA-256

Check the files

Each release has a SHA256SUMS.txt. Make the hash of your download and compare it with the line for that file. If the two are not the same, do not run the file.

Mac, in Terminal

shasum -a 256 renderd-host-v1.0.0-aarch64-apple-darwin.tar.gz

PC, in PowerShell

Get-FileHash .\renderd-viewer-v1.0.0-x86_64-pc-windows-msvc.zip

Or build it yourself from the source on GitHub.