Core Share Mac

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Core Share

Core Share is a page-rerouting application that targets Mac computers with the idea to hijack their browsers. Core Share is known for is its ability to display aggressive pop-up ads during web browsing sessions and to redirect users’ searches to sponsored URL’s.


The Core Share virus is a kind of annoying redirect software that needs to be removed

This activity can undoubtedly be distracting and, frankly, very irritating. Some users may even mistake it for activity caused by a virus or a symptom of a possible Trojan or Ransomware infection. Fortunately, this is not the case and if you follow the instructions in our removal guide you won’t have to deal with it any longer. In the steps below, we will show you how you can remove the nagging ads and how you can uninstall all changes that Core Share has imposed without your approval.

Core Share for Mac

Core Share for Mac is intrusive ad-generating software that is capable of hijacking your main web browser and filling it with sponsored search results and aggressive web ads. Unlike a virus, Core Share for Mac is not malicious, but its activity can be quite irritating.

According to security experts, Core Share operates as a browser hijacker and tends to make unauthorized changes in popular Mac browsers like Safari, Chrome, Firefox, etc. For instance, this app can install a new search engine, change the homepage domain and fill the screen with various potentially unwanted banners, blinking boxes and click-bait ads that redirect to unfamiliar web pages. Changes can also appear in the toolbar section of a browser, which may include new redirect buttons and add-ons. Most people are particularly upset at the auto-directs when the browser hijacker is installed on their device. They also complain that ever website they visit via the hijacked browser is typically filled with announcements of all sizes and shapes: pop-ups, banners, text links, box alerts, etc.

What is Core Share?

Core Share is a Mac application that can mess with the settings of any web browser. Typically, Core Share can replace the default search engine, change the homepage URL, install some page-redirect buttons and fill every visited web page with dozens of pop-ups ads.

Due to the aforementioned web browsing intervention, programs like Core Share or Yahoo Search are considered as potentially unwanted. What is more, after experiencing firsthand what such a browser hijacker can do, most people quickly conclude that this software is a kind of annoying redirect virus that needs to be removed. Nevertheless, the fact is that hijackers differ considerably from malicious programs, such as Trojans, Ransomware, worms and other web viruses because, contrary to them, they do not harm your Mac computer in any way.

The CoreShare app

The CoreShare app is a Mac program interested in promoting pay-per-click web ads and sponsored URLs during the users’ web browsing sessions. This explains why the CoreShare app modifies your browser’s settings and spams the screen with pop-up ads and redirects to certain predefined websites. In this way, the hijacker essentially ensures that you always get exposed to some sponsored ad or link regardless of what you do.

Nevertheless, such ad-driven behavior can quickly become an intolerable interruption of your web browsing. In addition, you can always click on something deceptive (a possible Trojan or Ransomware-infected link or web ad) when you are spammed with so many random messages. That is why it is better not to click on anything the browser hijacker shows and to uninstall it by using the instructions in the guide that follows. 


Name Core Share
Type Adware/Browser Hijacker
Detection Tool

anti-malware offerOFFER *Free Remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. SpyHunter's EULA, Privacy Policy, and more details about Free Remover.

Remove Core Share from Mac


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.



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:

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    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 Core Share 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 Core Share 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!


    About the author


    Lidia Howler

    Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.

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