Mac Virus

Upgrade Start 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. 

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Upgrade Start

Upgrade Start is an ad-generating and page-redirecting browser extension classified as a browser hijacker because of the unwelcome changes it introduces to the browser. Upgrade Start can change the search engine service and alter the address of the new-tab page without allowing you to revert the changes.

Upgrade Start

The Upgrade Start Mac Virus will interfere with your web browsing experience.

The app that is currently tampering with the settings of your Chrome, Firefox, or Safari browser isn’t some harmful Trojan, Ransomware, or Spyware virus. It is a browser hijacker and this means that you are likely to notice changes in different elements of the browser. Most commonly, the users realize that their browser’s homepage has been replaced and that a new homepage address greets them every time they start the browser. Such changes are usually introduced to the browser without the user’s direct approval and their purpose is to turn the affected browsing program into an ad-generating platform that constantly exposes the user to various forms of online advertisement. Some hijackers go as far as to redirect the user’s searches through the newly imposed search engine and homepage to sites that need promotion. Of course, the users themselves probably don’t want to visit those sites and this activity only disrupts their regular browsing.

Upgrade Start for Mac

Upgrade Start for Mac is a specific type of malware that infects the browser disguised as an add-on and tries to modify the browser’s settings. Upgrade Start for Mac is one of the so-called browser hijackers and it seeks to generate advertising revenue.

There, however, is an even bigger problem when it comes to browser hijackers. Those apps may be annoying, but what’s worse about them is that their redirects and random ads could sometimes be linked to unsafe sites or sites with misleading content. For example, it is not uncommon for users to get redirected to websites that have many clickbait ads in them that promote sham or low-quality software. Also, some hijackers may land you on phishing pages that seek to obtain sensitive information about you, including your name, online usernames and passwords, banking details, and so on.

What is Upgrade Start?

Upgrade Start is a junkware app for Mac responsible for sudden page-redirects in the browser that land the user on unknown and potentially unsafe sites. In and of itself, Upgrade Start isn’t harmful, but its redirects may possibly make your computer exposed to danger. 

The browser hijackers themselves aren’t specifically created to harm your system or expose you to misleading content and threats like Ransomware and Trojans. Their uncontrolled advertising activities, however, may indeed lead to a decrease in your Mac’s safety.

The UpgradeStart app

The Upgrade Start app is a sort of software that is designed to get your browser redirected to some partnering sites in order to artificially improve their traffic. The Upgrade Start app may initially seem like a regular browser extension but it is actually an unwanted application.

If you are concerned about the safety of your Mac and want to minimize the chances of encountering ads that may compromise the computer and make it vulnerable to Trojans, Spyware, Ransomware, and other similar threats, we advise you to make use of the following instructions and through them remove the unwanted app.


Name Upgrade Start
Type Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms The typical symptoms include a change in the browser’s homepage or the main search engine and a constant page-redirecting activity.
Distribution Method Browser hijackers can often be bundled in different free software installation packages, free download managers, torrents, spam messages and ads.
Detection Tool

Upgrade Start Mac Virus Removal


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 Upgrade Start 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 Upgrade Start 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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