Protect your Mac from malware
macOS has many features that help protect your Mac and your personal information from malicious software, or malware. One common way malware is distributed is by embedding it in a harmless-looking app.
You can reduce this risk by using software only from reliable sources. The settings in Security & Privacy preferences allow you to specify the sources of software installed on your Mac.
Choose Apple menu > System Preferences, click Security & Privacy, then click General.
Click the lock icon to unlock it, then enter an administrator name and password.
Select the sources from which you’ll allow software to be installed:
App Store: Allows apps only from the Mac App Store. This is the most secure setting. All the developers of apps in the Mac App Store are id