Mac - Accessing shared folders in Windows How to share files with Windows Let’s actually share them. Click System Preferences on the Apple menu. Click to open the System Preferences window, then click the folder-shaped Sharing icon. Check “File sharing” in the left column. If you check it, it will be “File sharing: On”. Next, click the “+” next to Shared Folders. Click to display the shared folder selection screen. Select the shared folder and click “Add”. Here we have selected “Desktop”. Click “Options” to set up access to your Mac from Windows. Optional setting. Check the displayed account.