Check which system services are using your location
Under the list of apps in Location Services there is a second list, with a dozen switches nobody has ever opened.
Tips tagged #security
Keep passwords, passkeys and codes in the Passwords app
Since macOS Sequoia, what Safari and iCloud Keychain save has its own app.
Make the Mac ask before a plugged-in accessory connects
An Apple silicon laptop decides on its own whether to trust what you plug into it. Check which rule yours is following.
Stop strangers AirDropping things to your Mac
Set to Everyone, AirDrop lets anyone in the same carriage put a picture on your screen.
Let macOS update itself
One switch in Software Update and another in Privacy & Security keep the security fixes arriving without you noticing.
Encrypt the startup disk with FileVault
Your disk is already encrypted; without FileVault the Mac can unlock it on its own, with no password from you.
Your login password is not your Apple Account password
macOS asks for two different passwords at different moments, and confusing them costs a lot of failed attempts.