Mac Virus

Mac Performance Virus

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. 

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Mac Performance

Mac Performance is a form of unwanted software known as a browser hijacker that specifically targets Mac browsers. Mac Performance is known for installing unwanted elements in the infected browsers. Those elements could be a new homepage, a new search service, or some new toolbar buttons.

Mac Performance

The Mac Performance Virus will try to take over your browser and make unwanted changes.

Having your favorite browser modified beyond recognition and filled with hundreds of nagging pop-ups, ads, new tabs and banners could be particularly frustrating, especially if you are using it on a daily basis for work or pleasure. What is more, browsing the web as before could be impossible if your homepage or search engine has been mysteriously replaced with another one or some new toolbars and buttons have clogged your neat taskbar. If you have recently experienced such a disturbance with your Safari, Chrome or Firefox browser, then you should know that the most probable reason for these unwanted changes and irritating ads is a browser hijacker such as Mac Performance. Now, the browser hijackers are commonly encountered pieces of software which oftentimes employ some aggressive online advertising methods in order to display pay-per-click ads and sponsored tools or websites on the users’ screen during their web browsing.

The Mac Performance Virus

The Mac Performance Virus is a potentially unwanted add-on that is compatible with most browsers you can have on a Mac computer. The reason Mac Performance is deemed unwanted is that it forcefully modifies the browser’s settings and automatically opens new tabs and pages.

Many people find their activities quite irritating and even mistake them for some nasty virus infections such as Trojans, Spyware or Ransomware. Luckily, these pieces of software are not malicious in their nature and usually their sole purpose is to simply promote different products, services, software, toolbars and apps. The main problem with hijackers, however, is that, in their attempts to advertise more effectively, applications such as Mac Performance can deliver an overwhelming amount of commercial content to your screen and disturb your normal web browsing experience. Reinstalling your browser or changing it with another one is unlikely to remove the ads stream or to rid you of the browser changes. That’s why the best thing you can do if you want to get your favorite browser settings back to normal is to fully uninstall the hijacker from the system by removing its hidden ad-generating and page-redirecting components. If you don’t know how to do that, in the removal guide below, we will show you the exact steps that you need to follow.

What is Mac Performance?

Mac Performance is a junkware web-browser extension that redirects the user’s traffic to sides focused on advertising. Mac Performance also scans through your browsing history and uses the collected data to modify the ads you see while you are surfing the net.

Browser hijacker applications such as Mac Performance are really widespread across the web and can often be found as free components or add-ons put inside some other programs and installation packages. Since their purpose is to advertise and not to perform actual cybercrimes, they aren’t considered to be as dangerous as real computer viruses. In fact, many users don’t really mind the ads and the browser changes that such applications may impose. However, there are people, who find it disturbing to constantly have to deal with hundreds of sponsored pop-ups, ads, banners and page-redirect links on their screen and that’s why they prefer to remove such software from their systems. Moreover, there is nothing that can guarantee that the offers and the sites that the hijacker generates are safe and reliable. And knowing what kind of nasty computer threats (such as Trojans, Rootkits, Spyware, Ransomware, you name it) can be spreading on the web via fake ads and misleading pop-ups, it is probably not a good idea to click on everything that an application like Mac Performance may display on your screen. For this reason, we advise you to consider the removal of the advertising software and use the instructions in the removal guide above for assistance.


Name Mac Performance
Type Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Unpleasant ads and page-redirects may constantly disturb your web browsing. 
Distribution Method Software bundles, free downloads, automatic installers torrents, ads. 
Detection Tool

Remove Mac Performance Virus


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:

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Maximum file size: 128MB.

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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 Mac Performance 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 Mac Performance 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!

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