Use the General pane of Security & Privacy preferences to protect your Mac from malware and tampering.
To open this pane, choose Apple menu > System Preferences, click Security & Privacy, then click General.
Click to change the login password for the current user.
Require password... after sleep or screen saver begins
Use this setting to lock your Mac when it’s left in an idle state. When the Mac wakes, a user login password must be entered before the Mac can be used. You can select the amount of time after the screen saver or sleep begins before a password is required.
Show a message when the screen is locked
Select to display a short message in the login window when your Mac is locked. The message will be shown to any users who attempt to log in. It can also be used to provide contact information for a lost Mac.
Disable automatic login
Select to require users to authenticate with a password when they log in after restarting the Mac. This feature isn’t available if FileVault is turned on.
Allow your Apple Watch to unlock your Mac
Use your Apple Watch (instead of entering your password) to unlock your Mac when you wake it from an idle state. For more information, see Unlock your Mac with Apple Watch.
This option is available only if your Mac supports Auto Unlock.
Allow apps downloaded from
You can protect your Mac from malware by only allowing apps that come from the App Store or from identified developers.
System software blocked
If you recently installed new software, it may attempt to load system extensions. Click Allow to load system extensions from the developer of the software.
Locks or unlocks Security & Privacy preferences. Click the lock icon to unlock it, then enter an administrator name and password.
Click to increase the security on your Mac by adjusting specific settings in Advanced preferences.