You Mac May Be Infected By A Virus! POP-UP Scam (Mac)

Also Known As: "You Mac may be infected by a virus!" virus
Type: Mac Virus
Distribution: Low
Damage level: Medium

How to remove Your Mac may be infected by a virus! from Mac?

What is Your Mac may be infected by a virus!?

"Your Mac may be infected by a virus!" is a fake error message delivered by various deceptive websites. Research shows that users often visit these sites inadvertently - they are redirected by potentially unwanted programs (PUPs) or intrusive ads displayed on other malicious websites. In most cases, potentially unwanted programs infiltrate systems without users’ permission. As well as causing redirects, PUPs deliver intrusive advertisements and record various sensitive information.

Your Mac may be infected by a virus! scam

The message essentially states that the user is not using an anti-virus/anti-spyware suite and, therefore, there is a high probability that the system is infected. Therefore, users are encouraged to immediately download a promoted system optimization/protection tool (at time of research, "Your Mac may be infected by a virus!" was used to promote the Mac Mechanic PUP). This is a scam. After installing Your Mac may be infected by a virus!2 and running a full system scan, users are presented with a list containing hundreds of system errors and infections. Furthermore, the free version of Your Mac may be infected by a virus!2 is incapable of resolving the listed issues and users are encouraged to purchase the 'full version'. Bear in mind, however, that the list of infections is fake. Cyber criminals generate revenue by tricking gullible users into purchasing software that is useless - the full version of Your Mac may be infected by a virus!2 simply cleans the fake list. Therefore, we strongly advise you to ignore all requests to purchase or even download the Your Mac may be infected by a virus!2 app. The "Your Mac may be infected by a virus!" message can be eliminated simply by closing the web browser, however, note that some rogue sites employ scripts that prevent users from closing browsing tabs/windows. In these cases, terminate the browser using Activity Monitor or simply reboot the system. In addition, do not restore the previous session the next time you open the terminated browser, since restoring the session will reopen malicious sites.

As mentioned above, potentially unwanted programs are likely to deliver various intrusive advertisements, such as coupons, banners, pop-ups, and so on. These are delivered using tools that enable placement of third party graphical content on any visited website. Therefore, intrusive advertisements often conceal underlying content, thereby significantly diminishing the browsing experience. Furthermore, intrusive ads might execute scripts that download and install malware/PUPs and redirect users to malicious websites. Therefore, clicking intrusive ads risks various computer infections. PUPs are also notorious for data tracking. Most gather IP addresses, website URLs visited, pages viewed, search queries, and other similar information relating to web browsing activity. This collected data often includes personal details that developers share with third parties (potentially, cyber criminals) who generate revenue by misusing private information. Therefore, having information-tracking apps installed on your computer can lead to serious privacy issues or even identity theft. You are strongly advised to eliminate all potentially unwanted programs immediately.

Threat Summary:
Name"You Mac may be infected by a virus!" virus
Threat TypeMac malware, Mac virus
SymptomsYour Mac became slower than normal, you see unwanted pop-up ads, you get redirected to shady websites.
Distribution methodsDeceptive pop-up ads, free software installers (bundling), fake flash player installers, torrent file downloads.
DamageInternet browsing tracking (potential privacy issues), displaying of unwanted ads, redirects to shady websites, loss of private information.
Removal

To eliminate You Mac may be infected by a virus! virus our malware researchers recommend scanning your computer with Combo Cleaner.
▼ Download Combo Cleaner
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Combo Cleaner.

There are many fake errors similar to "Your Mac may be infected by a virus!". The list of examples includes (but is not limited to) Apple Warning Alert, Critical System Error: x679Qs5m, Your Mac Is Infected With 3 Viruses, and We Have Detected A Trojan Virus. All claim that the system is damaged (e.g., infected, missing files, etc.) and although the solving problem methods offered are different (some encourage users to call fake 'tech support', whilst others promote fake malware removal software), their purpose is identical: to extort money from unsuspecting users. Potentially unwanted programs also share many similarities. By offering many "useful features", they attempt to give the impression of legitimacy, however, these applications are designed only to generate revenue for the developers. Rather than enabling the features promised, PUPs cause unwanted redirects, gather sensitive information, and deliver intrusive ads, thereby posing a direct threat to your privacy and Internet browsing safety.

How did potentially unwanted programs install on my computer?

Some potentially unwanted programs have official download websites, however, in most cases, these apps infiltrate systems without consent, since developers proliferate them using intrusive advertising and a deceptive marketing method called "bundling". Developers hide "bundled" apps within "Custom/Advanced" settings (or other sections) of the download/installation processes. Furthermore, many users are likely to rush these procedures and skip steps. In addition, they click advertisements, without understanding the possible consequences. This behavior often leads to inadvertent installation of PUPs - users expose their systems to risk of various infections and compromise their privacy.

How to avoid installation of potentially unwanted applications?

Lack of knowledge and careless behavior are the main reasons for computer infections. The key to safety is caution. Therefore, pay close attention when browsing the Internet and downloading/installing software. Carefully analyze each window of the download/installation processes and opt-out of all additionally-included programs. It is very important to download your programs from official sources only (using direct download links), rather than using third party downloaders/installers. Developers monetize downloaders/installers using the "bundling" method, and thus using these tools is not recommended. Intrusive ads typically seem legitimate, but once clicked, redirect to dubious websites (gambling, adult dating, pornography, etc.) If you experience these redirects, check the list of installed applications/browser plug-ins and eliminate any suspicious entries. If your computer is already infected with PUPs, we recommend running a scan with Combo Cleaner Antivirus for macOS to automatically eliminate them.

Text presented in this scam:

WARNING
Without antivirus, your system is at high risk.
We recommend downloading an antivirus program.
Download it immediately.

You Mac may be infected by a virus!
You are currently not using an antivirus program and therefore your personal and banking information may be exposed to considerable risk. We advise you to download an antivirus program and perform a scan immediately!
Contrary to popular belief, all operating systems are exposed to risk and yours is especially vulnerable and could be easily hacked.
Eliminate the risk immediately!
We recommend downloading antivirus software and performing a full-system scan of your device immediately.

Likely risks
Viruses
alware
eylogger

Appearance of "Your Mac may be infected by a virus!" scam (GIF):

Appearance of Your Mac may be infected by a virus! scam (GIF)

Instant automatic removal of You Mac may be infected by a virus! virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of You Mac may be infected by a virus! virus. Download it by clicking the button below:
▼ DOWNLOAD Combo Cleaner for Mac By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Combo Cleaner.

Quick menu:

Video showing how to remove adware and browser hijackers from a Mac computer:

Potentially unwanted programs removal:

Remove PUP-related potentially unwanted applications from your "Applications" folder:

mac adware removal from applications folder

Click the Finder icon. In the Finder window, select “Applications”. In the applications folder, look for “MPlayerX”,“NicePlayer”, or other suspicious applications and drag them to the Trash. After removing the potentially unwanted application(s) that cause online ads, scan your Mac for any remaining unwanted components.

Remove "you mac may be infected by a virus!" virus related files and folders:

Finder go to folder command

Click the Finder icon, from the menu bar. Choose Go, and click Go to Folder...

step1Check for adware-generated files in the /Library/LaunchAgents folder:

removing adware from launch agents folder step 1

In the Go to Folder... bar, type: /Library/LaunchAgents

removing adware from launch agents folder step 2
In the “LaunchAgents” folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, “kuklorest.update.plist”, etc. Adware commonly installs several files with the same string.

step2Check for adware generated files in the /Library/Application Support folder:

removing adware from application support folder step 1

In the Go to Folder... bar, type: /Library/Application Support

removing adware from application support folder step 2
In the “Application Support” folder, look for any recently-added suspicious folders. For example, “MplayerX” or “NicePlayer”, and move these folders to the Trash.

step3Check for adware-generated files in the ~/Library/LaunchAgents folder:

removing adware from ~launch agents folder step 1


In the Go to Folder bar, type: ~/Library/LaunchAgents

removing adware from ~launch agents folder step 2

In the “LaunchAgents” folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, “kuklorest.update.plist”, etc. Adware commonly installs several files with the same string.

step4Check for adware-generated files in the /Library/LaunchDaemons folder:

removing adware from launch daemons folder step 1
In the Go to Folder... bar, type: /Library/LaunchDaemons

removing adware from launch daemons folder step 2
In the “LaunchDaemons” folder, look for recently-added suspicious files. For example “com.aoudad.net-preferences.plist”, “com.myppes.net-preferences.plist”, "com.kuklorest.net-preferences.plist”, “com.avickUpd.plist”, etc., and move them to the Trash.

step 5 Scan your Mac with Combo Cleaner:

If you have followed all the steps in the correct order you Mac should be clean of infections. To be sure your system is not infected run a scan with Combo Cleaner Antivirus. Download it HERE. After downloading the file double click combocleaner.dmg installer, in the opened window drag and drop Combo Cleaner icon on top of the Applications icon. Now open your launchpad and click on the Combo Cleaner icon. Wait until Combo Cleaner updates it's virus definition database and click "Start Combo Scan" button.

scan-with-combo-cleaner-1

Combo Cleaner will scan your Mac for malware infections. If the antivirus scan displays "no threats found" - this means that you can continue with the removal guide, otherwise it's recommended to remove any found infections before continuing.

scan-with-combo-cleaner-2

After removing files and folders generated by the adware, continue to remove rogue extensions from your Internet browsers.

"You Mac may be infected by a virus!" virus removal from Internet browsers:

safari browser iconRemove malicious extensions from Safari:

Remove "you mac may be infected by a virus!" virus related Safari extensions:

safari browser preferences

Open Safari browser, from the menu bar, select "Safari" and click "Preferences...".

safari extensions window

In the preferences window, select "Extensions" and look for any recently-installed suspicious extensions. When located, click the "Uninstall" button next to it/them. Note that you can safely uninstall all extensions from your Safari browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Safari.

firefox browser iconRemove malicious plug-ins from Mozilla Firefox:

Remove "you mac may be infected by a virus!" virus related Mozilla Firefox add-ons:

accessing mozilla firefox add-ons

Open your Mozilla Firefox browser. At the top right corner of the screen, click the "Open Menu" (three horizontal lines) button. From the opened menu, choose "Add-ons".

removing malicious add-ons from mozilla firefox

Choose the "Extensions" tab and look for any recently-installed suspicious add-ons. When located, click the "Remove" button next to it/them. Note that you can safely uninstall all extensions from your Mozilla Firefox browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Mozilla Firefox.

chrome-browser-iconRemove malicious extensions from Google Chrome:

Remove "you mac may be infected by a virus!" virus related Google Chrome add-ons:

removing malicious google chrome extensions step 1

Open Google Chrome and click the "Chrome menu" (three horizontal lines) button located in the top-right corner of the browser window. From the drop-down menu, choose "More Tools" and select "Extensions".

removing malicious Google Chrome extensions step 2

In the "Extensions" window, look for any recently-installed suspicious add-ons. When located, click the "Trash" button next to it/them. Note that you can safely uninstall all extensions from your Google Chrome browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Google Chrome.

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global virus and spyware activity level today:

Medium threat activity
Medium

Increased attack rate of infections detected within the last 24 hours.

QR Code
You Mac may be infected by a virus! virus QR code
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Platform: macOS

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Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Combo Cleaner.