Search for and locate the official app published by Meta.
This is the safest way to ensure you are getting the official version from Meta Platforms, Inc..
Click the or "Install" button. If you aren't signed into a Microsoft account, you may be prompted to do so.
If you prefer not to use an app store, you can "install" the website version directly from your browser. This creates a standalone window without the usual browser clutter. How To Install Facebook On Laptop & PC - Full Guide
Once the download finishes, click to launch the app and sign in with your credentials. For macOS: Launch the Mac App Store from your Dock or Spotlight.