Quick Answer: To lock a note on your Mac, launch the Notes app, select the note you want to lock and click the Padlock icon, and click Lock Note. Either select Use Login Password or create a fresh password. You can also use TouchID or an Apple Watch to lock your notes.
Is your Apple Notes app filled with mad ramblings, odd lists, or secret plans for world domination? If the answer is yes—or you’ve jotted down something else you’d rather keep confidential—you should…
