Mac Os Defender Malware


Mac Os Defender

Mac Os Defender “Malware” is an annoying ad-generating piece of software (in short, adware), which may become part of your system in a number of ways. Mac Os Defender is created by a group of software developers as means of generating profits from pay-per-click ads and sponsored page-redirects.

Mac Os Defender Malware

The Mac OS Defender Malware pretend to scan your computer and then state that there are numerous files on your computer that are infected

The app’s goal is to display hundreds of pop-ups, banners and paid commercials on your screen during your regular web browsing and to make you click on them as often as possible. In order to advertise more effectively, Mac Os Defender typically gets installed in your default browser – be it Chrome, Explorer, Mozilla or another one, and it adds some ad-generating components and page-redirecting code to the browser. You can notice the application right away because the moment you open your browser, it aggressively starts to spam your monitor with sponsored domains, links and promotional messages.

To your relief, such behavior is not illegal and cannot cause any serious system issues or irreparable damage in most of the cases. Most of the applications which fall under the adware category, including Mac Os Defender, are generally not dangerous. However, many users wrongly refer to them as computer viruses and think of them as threats like Trojans or Ransomware because the adware applications can be very annoying and can often disturb the normal web surfing experience. They mostly “infect” computers when people perform a careless installation of software bundles and free third-party applications, free installers and pirated software and also when they interact with spam emails, suspicious links, misleading Considering the irritating behavior of this type of software, it is not surprising that you may currently be seeking ways to have Mac Os Defender uninstalled and all of its commercial messages removed from your PC. Luckily, on this page, we can help you with that. Just carefully follow the instructions in the removal guide below to safely eliminate the adware and its related disturbances.

Another good reason to consider the uninstallation of Mac Os Defender is its potential ability to track your online activities and browsing history and to gather details about your latest online searches. This is an activity typical for most adware applications and is closely related to their online advertising goals. The more this software knows about what you are looking for, the greater the chances of displaying ads that you may actually click on. To your relief, Mac Os Defender cannot typically collect sensitive data like online banking details, credit card number, social media account details, login credentials, passwords and similar personal data. Also, the hijacker is probably not going to cause any real harm to your system by messing with its data and processes in a malicious way. Such activities are the specialty of real computer viruses such as Trojans, Spyware, Rootkits, Ransomware and so on. However, all this monitoring and ad-generating services can eat up a fair share of system resources and make your computer slower. You may also face frequent browser unresponsiveness, crashes and general freezing of the screen, which may add up to your irritation and your desire to remove the nagging advertising software.


Name Mac Os Defender
Type  Adware
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms  Your browsing may get interrupted by ads, pop-ups, banners and annoying page-redirects on a regular basis.
Distribution Method Most commonly gets installed via software bundling and free automatic installers, spam messages, torrents and ads.
Detection Tool

Remove Mac Os Defender “Malware”

Mac Os Defender Malware

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.

Mac Os Defender Malware


Start Activity Monitor by opening up Finder, then proceed to Mac Os Defender Malware

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:

Mac Os Defender Malware

Now click on Sample at the bottom:

Mac Os Defender Malware

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:

Mac Os Defender Malware
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
Mac Os Defender MalwareClamAV
Mac Os Defender MalwareAVG AV
Mac Os Defender MalwareMaldet

Mac Os Defender Malware

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.

Mac Os Defender Malware

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,

Mac Os Defender Malware

and then again on the Extensions tab,

Mac Os Defender Malware

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.
Mac Os Defender Malware

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,
Mac Os Defender Malware

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

Mac Os Defender Malware

Check if your Homepage is the one you have selected, if not change it to whatever you prefer.
Mac Os Defender Malware

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

Mac Os Defender Malware How to Remove Mac Os Defender From Firefox in OSX:

Open Firefoxclick on Mac Os Defender Malware (top right) ——-> Add-onsHit Extensions next.

Mac Os Defender Malware

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

Mac Os Defender MalwareHow to Remove Mac Os Defender From Chrome in OSX:

 Start Chrome, click Mac Os Defender Malware —–>More Tools —–> Extensions. There,  find the malware and  select  Mac Os Defender Malware.

Mac Os Defender Malware

 Click Mac Os Defender Malware 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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