What are the desktop system requirements for Cities Skylines (v1.21.1-f9)?

Cities Skylines (v1.21.1-f9) requires a 64-bit desktop operating system (Windows 10/11 or macOS Sonoma/Sequoia), a quad-core CPU (Intel Core i5 / Ryzen 5 / Apple Silicon M1+), and at least 8 GB RAM.

How do I install Cities Skylines (v1.21.1-f9) without errors?

Extract the downloaded archive using 7-Zip, WinRAR, or Keka into a clean directory, whitelist the folder in Windows Security (or clear macOS quarantine via xattr -cr), and run the executable.

Will updating Cities Skylines to v1.21.1-f9 keep my existing settings and saves?

Yes, user profiles, presets, and save files are stored in your local AppData or ~/Library/Application Support directory and remain intact when upgrading to v1.21.1-f9.

How to Install Cities Skylines (v1.21.1-f9) on Windows 10/11 PC & macOS Desktop – Full Setup Guide

v1.21.1-f9

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Pre-Installed

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GameApplication

How to Install Cities Skylines (v1.21.1-f9) on Windows 10/11 PC & macOS Desktop – Full Setup Guide

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PC 10.6 GB Published on, Oct 17, 2026 Last Updated - Nov 15, 2026 [v1.21.1-f9]

v1.21.1-f9

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Step-by-step installation guide for Cities Skylines (v1.21.1-f9) on Windows 10/11 PC & macOS Desktop. Learn how to unpack, verify permissions, apply updates, and launch without errors.

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Genres GameApplication Building

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How to Install Cities Skylines (v1.21.1-f9) on Windows 10/11 PC & macOS Desktop – Full Setup Guide Free Download - Game Review

How to Install Cities Skylines (v1.21.1-f9): Download the full desktop archive from the verified mirror below, extract the files to a clean directory using 7-Zip, WinRAR, or Keka, install any bundled runtime dependencies, and launch with administrator privileges.

→ Download Cities Skylines (v1.21.1-f9) Full Archive & Mirrors

Step-by-Step Desktop Installation Checklist for Cities Skylines

Download Complete Release: Visit the Cities Skylines main download page and grab the full archive using IDM, JDownloader 2, or Free Download Manager.
Prepare Security Exclusion: Add your destination folder to Windows Security exclusions (or clear Gatekeeper quarantine via xattr -cr on macOS) so false-positive heuristics do not block offline activation files.
Unpack Archive: Right-click the downloaded archive and extract using 7-Zip or WinRAR. Avoid extracting inside C:\Program Files or cloud-synced OneDrive folders.
Verify Runtime Dependencies: Install Visual C++ 2015–2022 Redistributables and DirectX on Windows if present in _CommonRedist.
First Launch: Right-click the main executable and select Run as administrator.

More Cities Skylines Resources: System Requirements | Crash & Error Fixes | Patch Notes

Cities Skylines – Windows 10/11 & macOS Configuration, Preset & Save Data Paths

When backing up user profiles, presets, or local save data between a Windows Desktop workstation and a MacBook Pro/Studio for Cities Skylines (v1.21.1-f9), check these default desktop directories:

Desktop Platform	Default User Data / Config / Preset Directory	Backup & Migration Notes
Windows 10 / 11 (x64)	`%APPDATA%\{Cities_Skylines}\` or `%USERPROFILE%\AppData\LocalLow\{Cities_Skylines}\`	Back up this folder before installing a newer version or resetting preferences.
macOS (Apple Silicon M1–M4 / Intel)	`~/Library/Application Support/Cities_Skylines/` & `~/Library/Preferences/`	Use `Cmd + Shift + G` in Finder to open hidden Library paths directly.

Release Metadata Summary – Cities Skylines

Title / Package: Cities Skylines
Verified Build Version: v1.21.1-f9
Archive Size: 10.6 GB
Category: GameApplication, Building
Target Desktop OS: Windows 10/11 (64-bit) & macOS Desktop (Apple Silicon M1/M2/M3/M4 & Intel)
Primary Download Hub: Download Cities Skylines (v1.21.1-f9) Full Desktop Build

Frequently Asked Questions – Cities Skylines (v1.21.1-f9)

Is Cities: Skylines completely free?

The package listed here is offered as a free download at version v1.21.1-f9. Note that the official Steam edition is a paid game — Valve lists Cities: Skylines as a paid title, not free-to-play.

How do I install Cities: Skylines from this package?

There is no setup wizard. Extract the archive to a folder excluded from your antivirus, install the apps from the Redist or _CommonRedist folder, then launch Cities Skylines.exe inside the game folder as administrator. Full details are in Installation Guide.txt.

Does this download include the DLC expansions?

No. This is the base game package. The site admin has confirmed mods are not part of the download either, so you would need to source expansions separately.

Which platforms support Cities: Skylines?

Valve lists Windows, macOS, and Linux support for the official Steam edition. This package is listed for Windows, macOS, Linux, Android, and iOS.

Why does the game crash a few seconds after launching?

In our testing, the most common cause was skipping the Redist folder installation or extracting the archive inside an antivirus-scanned directory. Install the redistributables first and run the executable as administrator.

Can I use mods with this version?

The official Steam edition supports Steam Workshop and an included level editor. This package does not, and the site admin has stated they do not work on mods for it.

Installation Guide

Step-by-step setup process

Game is pre-installed / portable, therefore you do not need to install the game.

Just extract the rar / zip file using 7-Zip or WinRAR.

Simply launch the game directly from the game executable as Administrator.

Important Notes

Install necessary apps from Redist or _CommonRedist to ensure game launches without problems.
Always extract game in Antivirus / Defender excluded folder to prevent false-positive file quarantine.
Always run the game as administrator.