Silent install command for Unity 2021 (CN Version) 2021.3.45f2c1

The exact silent switches the Unity 2021 (CN Version) installer accepts, plus a one-line command you can paste into a script, Intune Win32 app, or Configuration Manager package.

One-line silent install (x64, machine scope)

UnitySetup64-2021.3.45f2c1.exe /S

Run from the directory containing UnitySetup64-2021.3.45f2c1.exe. Download the installer from the Direct link below first. Run an elevated terminal (Run as Administrator) for machine-scope installs.

Architecture	Scope	Type	Silent switches	Source
x64	machine	EXE NSIS		Default for NSIS (Nullsoft)

Declared by publisher means the switches come straight from the winget manifest the publisher (or community maintainer) submitted to microsoft/winget-pkgs.
Default for {type} means the manifest doesn't specify silent switches, so the framework's standard switches are shown (e.g. /S for NSIS, /quiet /norestart for MSI).

Frequently asked questions

What is the silent install command for Unity 2021 (CN Version)?

Unity 2021 (CN Version) uses EXE (NSIS). After downloading the installer, run: UnitySetup64-2021.3.45f2c1.exe /S. The silent install switches are /S.

How do I deploy Unity 2021 (CN Version) via Intune or Configuration Manager?

Use winget for the cleanest path: winget install --id Unity.Unity.CN.2021 --exact 2021.3.45f2c1 --silent --accept-package-agreements --accept-source-agreements. If winget isn't viable in your environment, package the publisher's installer directly using the silent switches above.

Prefer the winget route? See the full Unity 2021 (CN Version) install page.