Mac Virus

Value Know Mac

Parasite may reinstall itself multiple times if you don't delete its core files. We recommend downloading ComboCleaner to scan for malicious programs installed with it. This may save you hours and cut down your time to about 15 minutes. 

Download ComboCleaner Anti-Malware

More information about ComboCleaner and steps to uninstall. Please review ComboCleaner's EULA and Privacy Policy. Keep in mind, only ComboCleaner’s scanner is free. If it detects a malware, you'll need to purchase its full version to remove it.

Value Know

Value Know is a browser hijacking application for Mac, which promotes sponsored websites by hijacking browsers and redirecting users’ searches. Value Know adds new browser features, such as new browser toolbars and buttons and places a new homepage and/or search engine.

Value Know

The Value Know App will display pop up ads and windows

Value Know can take over almost any popular browser including Firefox, Chrome, and Safari since they are some of the most commonly used browsers that Mac users utilize. But, this doesn’t mean that if you are using another web browser, it won’t be targeted by Value Know. This browser hijacker can easily alter its settings as well.

The main objective of such software is to benefit its creators financially. This happens through sponsored redirects to specific web pages and through the generation of various aggressive ads, pop-ups, and banners during the users’ web browsing sessions. The more people are led to the advertised pages, the bigger the pay-per-click profits received by the creators of the browser hijackers. This is the overall behavior of applications of this type.

Value Know for Mac

Value Know for Mac is an ad-generating application that tends to hijack Mac browsers in order to reroute user searches to the pages it is intended to promote. Value Know for Mac is able to modify the browser’s settings by integrating helper components such as a new search engine, a sponsored homepage or some quick redirect buttons.

For example, the new search engine placed in your Mac browser by Value Know may automatically display some sponsored websites every time you search for something on the web. Or, the new homepage that has been placed now automatically opens a pre-defined URL the moment you start the browser. As a result, you may find it difficult to navigate past those sponsored pages and find the real search results you are interested in. Besides, you may frequently get interrupted by dozens of pop-up ads during your web surfing sessions and find yourself stuck in attempts to remove them from your screen. Not only can this be very annoying, but also, sometimes, the ads and the websites to which you are rerouted may mask phishing pages or hide threats, such as Ransomware viruses and Trojans.

What is Value Know?

Value Know is a browser extension for Mac optimized for pay-per-click advertising. Most commonly Value Know is used to spam the Mac browser with promotional ads, pop-ups and redirect links to sponsored websites.

In general, Value Know is not a serious danger to any Mac computer and cannot damage it or cause any significant disruption to its performance. Yet, such a browser hijacker doesn’t provide many practical functions that can compensate for its aggressive advertising behavior. Therefore, an app such as Value Know can certainly be considered potentially unwanted.

The ValueKnow app

The ValueKnow app is a browser hijacker piece of software that is capable of integrating with every Mac web browser and causing it to display questionable content or reroute to unknown pages. For this reason, the ValueKnow app should be removed and safely uninstalled from the compromised computer. If you don’t want to accidentally bump into websites that may contain Trojans, Ransomware viruses and other unreliable content, we suggest you check out the removal guide below and use it to uninstall this hijacker and protect your Mac.


Name Value Know
Type Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Redirects to random websites, browser changes, intrusive ads all over the web browser’s screen.
Distribution Method Browser Hijackers are often distributed via free program bundles, torrents, click-bait ads, and spam messages.
Detection Tool

Remove Value Know App

For a quick way to remove Value Know try to do this inside your Mac browser:

  1. Open your Mac browser.
  2. Go to Preferences.
  3. Now navigate to the extensions sub-menu.
  4. Look for any unfamiliar entries, including Value Know.
  5. Remove Value Know from your Mac as well as any other suspicious-looking items by clicking on the trash bin icon.

If this does not help then continue reading this article for more detailed instructions on how to get rid of Value Know!


We get asked this a lot, so we are putting it here: Removing parasite manually may take hours and damage your system in the process. We recommend downloading ComboCleaner to see if it can detect parasite files for you.

The first thing you need to do is to Quit Safari (if it is opened). If you have trouble closing it normally, you may need to Force Quit Safari:

You can choose the Apple menu and click on Force Quit.

Alternatively you can simultaneously press (the Command key situated next to the space bar), Option (the key right next to it) and Escape (the key located at the upper left corner of your keyboard).

If you have done it right a dialog box titled Force Quit Applications will open up.

In this new dialog window select Safari, then press the Force Quit button, then confirm with Force Quit again.

Close the dialog box/window.



To remove parasite on your own, you may have to meddle with system files and registries. If you were to do this, you need to be extremely careful, because you may damage your system.

If you want to avoid the risk, we recommend downloading ComboCleaner
a professional malware removal tool.

More information on ComboCleaner, steps to uninstallEULA, and Privacy Policy.

Start Activity Monitor by opening up Finder, then proceed to activity-monitor

Once there, look at all the processes: if you believe any of them are hijacking your results, or are part of the problem, highlight the process with your mouse, then click the “i” button at the top. This will open up the following box:


Now click on Sample at the bottom:


Do this for all processes you believe are part of the threat, and run any suspicious files in our online virus scanner, then delete the malicious files:

Drag and Drop Files Here to Scan
Maximum file size: 128MB.

This scanner is free and will always remain free for our website's users. You can find its full-page version at:

Scan Results

Virus Scanner Result


The next step is to safely launch Safari again. Press and hold the Shift key while relaunching Safari. This will prevent Safari’s previously opened pages from loading again. Once Safari is opened up, you can release the Shift key.

On the off chance that you are still having trouble with scripts interrupting the closing of unwanted pages in Safari, you may need to take some additional measures.

First, Force Quit Safari again.

Now if you are using a Wi-Fi connection turn it off by selecting Wi-Fi off in you Mac’s Menu. If you are using a cable internet (Ethernet connection), disconnect the Ethernet cable.


Re-Launch Safari but don’t forget to press and hold the Shift button while doing it, so no previous pages can be opened up. Now, Click on Preferences in the Safari menu,

Preferences in Safari

and then again on the Extensions tab,

extensions in safari

Select and Uninstall any extensions that you don’t recognize by clicking on the Uninstall button. If you are not sure and don’t want to take any risks you can safely uninstall all extensions, none are required for normal system operation.

The threat has likely infected all of your browsers. The instructions below need to be applied for all browsers you are using.

Again select Preferences in the Safari Menu, but this time click on the Privacy tab,
Privacy in Safari

Now click on Remove All Website Data, confirm with Remove Now. Keep in mind that after you do this all stored website data will be deleted. You will need to sign-in again for all websites that require any form of authentication.

Still in the Preferences menu, hit the General tab

General Tab in Safari

Check if your Homepage is the one you have selected, if not change it to whatever you prefer.
Default Home Page

Select the History menu this time, and click on Clear History. This way you will prevent accidentally opening a problematic web page again.

firefox-512 How to Remove Value Know From Firefox in OSX:

Open Firefoxclick on mozilla menu (top right) ——-> Add-onsHit Extensions next.

pic 6

The problem should be lurking somewhere around here –  Remove it. Then Refresh Your Firefox Settings.

chrome-logo-transparent-backgroundHow to Remove Value Know From Chrome in OSX:

 Start Chrome, click chrome menu icon —–>More Tools —–> Extensions. There,  find the malware and  select  chrome-trash-icon.

pic 8

 Click chrome menu icon again, and proceed to Settings —> Search, the fourth tab, select Manage Search Engines.  Delete everything but the search engines you normally use. After that Reset Your Chrome Settings.

If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!

Leave a Comment