Critical Virus Alert Mac

Critical Virus Alert

Experts identify Critical Virus Alert as a browser hijacker for Mac-compatible web browsers. As a typical hijacker, Critical Virus Alert will alter the settings of your main browser to serve its purposes. Browser hijackers are generally seen as potentially unwanted programs or PUPs. Their goal is to profit from their developers by means of generating and displaying online ads directly in the browsing programs of affected users. This, in turn, is achieved by integrating ad-generating and other components in the host browsers, be it Chrome, Firefox, Safari or others. As a result, the web browser becomes a platform for popups, banners, box messages, page redirects and other such methods of showcasing sponsored messages, products and services.

Critical Virus Alert
Critical Virus Alert pop up will try to scam you that you have a virus in your device

It’s no surprise that users become frustrated with these effects and seek for ways to remove the intrusive browser hijacker and restore their original browser settings. But oftentimes this proves to be a more difficult task than it seems, as software like Critical Virus Alert or Search Alpha doesn’t offer an automated uninstallation option and must be removed manually – with all of its residual components. You can find instructions on how to do this in the removal guide we have put together for you on this page, just below the current article.

Critical Virus Alert for Mac

Critical Virus Alert for Mac is notorious for its ability to generate vast quantities of ads on users’ screens during their browsing sessions. And as any browser hijacker, Critical Virus Alert for Mac basically acts as an online advertising tool. What users often worry about when faced with programs like this is how safe they are. It does not possess the actual dangerous qualities of Trojans, ransomware and other viruses that may damage your computer, but it doesn’t benefit the end user in any way and, in fact, acts in an invasive and rather undesirable way.

Critical Virus Alert Mac
The Critical Virus Alert pop up

What is Critical Virus Alert Pop up?

Software like Critical Virus Alert pop up typically operates on the basis of Pay Per Click and similar remuneration schemes. And to procure more clicks, Critical Virus Alert pop up may monitor and record users’ browsing patterns. This will result in obtaining valuable marketing information from each individual user to help the hijacker fine tune its advertising campaigns. However, there are no guarantees that this information won’t be used for other purposes and won’t be sold to third parties for whatever reasons. Most importantly, the affected users will almost certainly not be informed of these processes.

Critical Virus Alert on Google Chrome

The Critical Virus Alert on Google Chrome may put a significant strain on your Mac’s system resources due to the processes it constantly runs in the background. Therefore, the Critical Virus Alert on Google Chrome may at some point lead to a compromised system performance. In addition, a browser hijacker may override some of your browser configurations to impose its own. Most commonly this will result in the substitution of your chosen homepage with a new one. It may also happen that these pop ups will set a new search engine as the default one to ensure that it can push more sponsored search results on you.


NameCritical Virus Alert
TypeBrowser Hijacker
Detection Tool 

Remove Critical Virus Alert from Mac

To remove Critical Virus Alert form Mac, uninstall any unwanted apps from the system, quit the hijacker process, delete any files related to it, and clean the browsers.

  1. First, go to the Applications folder, look for rogue apps located in it and uninstall them.
  2. Next, search for suspicious processes in the Activity Monitor and quit them.
  3. Go to the /Library/LaunchAgents, ~/Library/LaunchAgents, ~/Library/Application Support, and  /Library/LaunchDaemons folders and delete any rogue files stored in them.
  4. Uninstall any unwanted extensions from all of your browsers.

Those four steps are a generalization of what must be done to make sure that the Critical Virus Alert hijacker is gone from the computer and that there’s no data related to it left in the system. If you need a more detailed explanation of how to complete each of the steps, please, look to the instructions we’ve shown below.

Detailed Removal Steps for Critical Virus Alert

Step 1: Delete rogue apps

Go to Finder (from the menu bar at the top) > Applications and look for items that you aren’t familiar with and that you think may have been installed without your permission. If you see anything like that, delete it by dragging its icon to the Trash. Also look for apps you have recently installed, but that may not be safe and that may be related to Critical Virus Alert. Again, if any such apps are found, delete them.

Finally, after you think there are no suspicious items left in the Applications folder, go to the Trash, right-click it, and select the Secure Empty Trash button.

Step 2: Quit suspicious processes


From the Applications folder, open Utilities and start the utility labelled Activity Monitor. In it, look for the processes that are consuming the most memory, battery life, or CPU, and examine their names. If any of the processes’ names look odd or unfamiliar, conduct an online search for those names to see what information you can find. If there are online reports that any of the processes you looked up may be malicious and/or linked to Critical Virus Alert, quit that process. To quit a suspected process, click on its name in the Activity Monitor and then select the X in the top-left.

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Step 3: Delete hijacker files

From your Mac’s keyboard, press Command + Shift + G and then type /Library/LaunchAgents in the Go to Folder box. Hit Enter or click on GO to open that folder and in it look at all files created after the date you think the hijacker first appeared on your Mac. Scan those files with our free malware scanner that you can find below:

Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
This scanner is free and will always remain free for our website's users.
This file is not matched with any known malware in the database. You can either do a full real-time scan of the file or skip it to upload a new file. Doing a full scan with 64 antivirus programs can take up to 3-4 minutes per file.
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Each file will be scanned with up to 64 antivirus programs to ensure maximum accuracy
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    You must delete any file that may get flagged as malicious.

    After you scan the files and delete the malware ones, use the Go to Folder search to visit these next two folders:

    • ~/Library/LaunchAgents
    • /Library/LaunchDaemons

    Scan their most recent files and delete the ones that are detected to contain malware code.

    Finally, open the ~/Library/Application Support folder – in it, you must see if there are any sub-folders that may be from Critical Virus Alert. You can still use the scanner to test the files contained in the different subfolders to figure out if any of them contain malware. If rogue files are detected in any of the sub-folders, delete the entire folders along with all the files that are in them.

    Uninstall Critical Virus Alert from Safari

    To uninstall Critical Virus Alert from Safari, you must make sure there are no unwanted add-ons in the browser, and you must also restore any altered browser settings.

    1. Start the browser, click Safari from the top, and open Preferences.
    2. Select Extensions and find out if there’s anything unwanted among the Safari extensions – look for unknown items as well as ones that look suspicious.
    3. If you think one or more of the add-ons shouldn’t be there, uninstall them.
    4. Check other important browser settings such as the homepage and if they have been changed without permission, revert the changes.
    This image has an empty alt attribute; its file name is safari-extension.jpg

    It is highly possible that other changes have been made in Safari by the hijacker, so there are a couple more things that you must do in this browser.

    First, go to Preferences again and this time open the Privacy section, where you will see a Remove all Website Data button. Select that button and then click on Remove Now to clear the browsing data and remove any temporary files that may be linked to Critical Virus Alert.

    This image has an empty alt attribute; its file name is remove-website-data-mac-safari.jpg

    The next thing that must be done is to go to Preferences > General and there check the address that’s currently set as the browser’s homepage. If that address has been modified without your approval, you must restore the previous one since the current one has likely been added by Critical Virus Alert.

    General Tab in Safari
    Default Home Page

    Lastly, though not absolutely necessary, it is suggested to clear the browsing history. You can do this by selecting History from the menu bar while in Safari, clicking on Clear History, selecting the All History setting, and then selecting Clear History one more time.

    This image has an empty alt attribute; its file name is safari-delete-history-1.jpg

    Check the other browsers

    Critical Virus Alert is capable of entering any browser and not only Safari. Therefore, if there are any other browsing programs on your Mac, you must check them too.

    Firefox Instructions

    To check for rogue extensions in Firefox, select its menu (three-line icon in the top-right) and go to Add-ons. Just like in Safari, find and delete any seemingly unwanted or unfamiliar extension from the browser.

    pic 6

    After that, you should also make sure that any other potential changes made by Critical Virus Alert in the browser are taken care of as well. To do that, visit this page and follow the instructions for Firefox there to restore the browser settings.

    Google Chrome Instructions

    When you open the Google Chrome browser, go to its menu (the three dots below the X button) and select More Tools > Extensions. On the extensions page, toggle off (disable) any suspicious add-ons and then click on their Remove buttons to delete them.

    pic 8

    Next, go to Settings from the menu, select the Search Engine settings from the left, and then click on Manage Search Engines.

    Disable/remove any search engines listed there that you don’t recognize or normally use by clicking on the three dots next to the suspicious search engine and then selecting the Remove from the List option.

    Last but not least, remember to perform a refresh of the other Chrome settings – instructions on how to do this are available in this article.

    If Critical Virus Alert is still being a problem

    In some rare cases, the hijacker may still be in the system even after completing the whole guide. If this happens to you, we suggest using the powerful anti-malware program from the current page to take care of the problem. It will find and delete all Critical Virus Alert-related data in no time, and it will also protect your Mac from future malware threats and potentially unwanted apps.


    About the author


    Violet George

    Violet is an active writer with a passion for all things cyber security. She enjoys helping victims of computer virus infections remove them and successfully deal with the aftermath of the attacks. But most importantly, Violet makes it her priority to spend time educating people on privacy issues and maintaining the safety of their computers. It is her firm belief that by spreading this information, she can empower web users to effectively protect their personal data and their devices from hackers and cybercriminals.

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