To sync SharePoint library to your computer, it will use the OneDrive client for syncing.
Windows - By default if you have Windows 10, OneDrive is already installed
Mac - Download and install from the Mac App Store: https://apps.apple.com/au/app/onedrive/id823766827?mt=12
- Sign in to your organization's SharePoint in Microsoft 365 site with your account and open the library (Documents) that you wanted to sync
- Click on the Sync button
- Click on Open OneDrive
- Enter your email address on the box and click Sign in
- At the prompt, click Sync Now to start the sync app wizard. The wizard automatically fills in the name and web address of the library.
- You should be able to see the library you synced in your File Explorer