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Microsoft Security Intelligence
Published May 23, 2011 | Updated Aug 22, 2017


Detected by Microsoft Defender Antivirus

Aliases: MacDefender (other) MacSecurity (other) MacProtector (other)


Rogue:MacOS_X/FakeMacdef is a family of rogue programs that affect Mac OSX. They claim to scan for malware and display fake warning messages regarding “malicious programs and viruses”. They attempt to scare you into paying for the fake product by displaying fake scan results, infection messages and warnings.

You can read more on our rogue page.

Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product.

For more information on antivirus software, see

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