Before macOS Ventura, you could lock notes with a special passcode, which, when forgotten, could be a pain in the butt. But with the latest rev of the operating system, things are simpler: you can now secure any note with the device password or Touch ID.
The previous way
But first let’s look at the previous method using passcodes:
° Open the Notes app and go to the menu bar.
° Click Notes → Settings.
° Choose an account beside Locked notes if you have multiple accounts.
° Enter a password in the password field.
° Enter it again in the Verify field. Add a hint if you wish to help you remember the password.
° Click “Set Password.”
The macOS Ventura way
The process is, as mentioned, simpler in macOS Ventura. To lock a note:
° Open Notes app.
° Go to the menu bar and select Settings.
° At the bottom of the pop-up mention, you’ll see a “Locked notes” option and choices for using a login password, changing the password, and Use Touch ID
° Click “Use Login Password” and follow the prompts to set up a password. You can always change the password later by using (d-uh) “Change Password.”
To enable Touch ID to use your fingerprint to view locked notes:
° Toggle on the Enable Touch ID box.
° Click the box.
° Enter the login password for your Mac to enable Touch ID.
° Control-click on the note you want to lock or unlock.
° Click Lock Note or Unlock Note.