There really is built-in anti-malware software as a part of macOS. It gets malware "definitions" just like the third-party software and even has a blacklist of things that should never run on your Mac, as well as minimum versions of Safari plug-ins that are required.You can see how recently your XProtect data has been updated by looking for the XProtect* files in /System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ and examining their modification dates. Then you can read those files to see what's inside. The two files are: <ul> <li>/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/XProtect.meta.plist</li> <li>/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/XProtect.plist</li></ul>
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