Malware Scanner For Mac

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A phishing scam has targeted Mac users by redirecting them from legitimate websites to fake websites which tell them that their computer is infected with a virus. The user is then offered Mac Defender 'anti-virus' software to solve the issue.
This “anti-virus” software is malware (i.e. malicious software). Its ultimate goal is to get the user's credit card information which may be used for fraudulent purposes.
The most common names for this malware are MacDefender, MacProtector and MacSecurity.

Apple released a free software update (Security Update 2011-003) that will automatically find and remove Mac Defender malware and its known variants.
The Resolution section below also provides step-by-step instructions on how to avoid or manually remove this malware.

Resolution

How to avoid installing this malware

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If any notifications about viruses or security software appear, quit Safari or any other browser that you are using. If a normal attempt at quitting the browser doesn’t work, then Force Quit the browser.

In some cases, your browser may automatically download and launch the installer for this malicious software. If this happens, cancel the installation process; do not enter your administrator password. Delete the installer immediately using the steps below.

  1. Go into the Downloads folder, or your preferred download location.
  2. Drag the installer to the Trash.
  3. Empty the Trash.

How to remove this malware

If the malware has been installed, we recommend the following actions:

  • Do not provide your credit card information under any circumstances.
  • Use the Removal Steps below.
Malware Scanner For Mac

Removal steps

  1. Move or close the Scan Window.
  2. Go to the Utilities folder in the Applications folder and launch Activity Monitor.
  3. Choose All Processes from the pop up menu in the upper right corner of the window.
  4. Under the Process Name column, look for the name of the app and click to select it; common app names include: MacDefender, MacSecurity or MacProtector.
  5. Click the Quit Process button in the upper left corner of the window and select Quit.
  6. Quit Activity Monitor application.
  7. Open the Applications folder.
  8. Locate the app ex. MacDefender, MacSecurity, MacProtector or other name.
  9. Drag to Trash, and empty Trash.

Malware also installs a login item in your account in System Preferences. Removal of the login item is not necessary, but you can remove it by following the steps below.

Free Malware Scanner For Mac Os X

  • Open System Preferences, select Accounts, then Login Items
  • Select the name of the app you removed in the steps above ex. MacDefender, MacSecurity, MacProtector
  • Click the minus button

Use the steps in the “How to avoid installing this malware” section above to remove the installer from the download location.

Note: Apple provides security updates for the Mac exclusively through Software Update and the Apple Support Downloads site. User should exercise caution any time they are asked to enter sensitive personal information online.

Scanning your computer helps detect and remove malware, viruses, trojans, and other potentially unwanted items. If you have Malwarebytes on a Mac device, we recommend scanning your computer at least once a week, even if you have real-time protection turned on.

Scan with Malwarebytes for Mac

If you have Malwarebytes for Mac, you can run a Threat Scan whenever your computer is turned on. Scheduled scans are not available with Malwarebytes for Mac Free version.

  1. Open Malwarebytes for Mac.
  2. To the left, click Scan.
  3. Click Start Scan.

When Malwarebytes for Mac scan completes, the Scan window displays your Scan Results. From the Scan Results, you can choose which items you want to quarantine or keep on your computer, if any are found. Check the boxes next to each item you want to quarantine or keep on your hard drive.

There are two actions you can take with checked items:

Virus And Malware Scanner For Mac

  • Click Cancel to skip further processing of the checked items.
  • Click Confirm to move the checked items to your quarantine.

See also

  • Return to Malwarebytes for Mac guide
  • Schedule a Malwarebytes scan on your Mac