When it comes to protecting confidential files on your Mac, password-locking a folder is a crucial step in ensuring your data remains secure. Unfortunately, macOS doesn't offer a built-in feature to password-protect folders, but there are workarounds you can utilize:

1. Using Disk Utility: You can create an encrypted disk image using Disk Utility and store your sensitive files within it. This encrypted image will require a password to access its contents.
2. Third-Party Apps: There are numerous third-party applications like 'Folder Lock' or 'Encrypto' available on the App Store that allow you to password-protect folders on your Mac.
3. Mac Terminal: For more advanced users, you can use the Terminal to create a password-protected zip file containing your folder's contents.

By implementing one of these methods, you can add an extra layer of security to your confidential files and prevent unauthorized access.