How To Clean My Macbook Air From Virus For Free

If your Macbook or iMac slows down, your screen is inundated with annoying ads, your browser settings change, or there's a weird increase in your system's Internet activity, then it is possible that you have malware installed on your computer. This guide teaches you how to remove all types of Malware from macOS for free by following easy step-by-step instructions.

Mac Adware

Mac OS Pop-up Ads Virus

Can Macs get infected with malware?

Adware, browser hijackers, and unwanted apps are these days able to infect even the macOS operating system. These types of infections are designed specifically to make money. They generate web traffic, collect sales leads for other dubious sites, and will display advertisements and sponsored links within your web browser.

Once a malicious program is installed on your Mac, unwanted advertisements will pop up on your computer, unknown programs are installed on your device, or your browser settings will be changed without your consent.

When malware is installed on macOS, common symptoms include:

Advertisements appear in places they shouldn't be.
Your web browser's homepage has mysteriously changed without your permission.
Web pages that you typically visit are not displaying properly.
Website links redirect to sites different from what you expected.
Browser popups appear which recommend fake updates or other software.
Unwanted programs are installed without your knowledge.

This guide was written to help Mac users remove adware and browser hijackers from their devices, if your just looking for a way to block or remove advertisements from the sites you visit, then you can use a free browser extension like AdGuard.

How did my Mac get infected with malware?

Malicious apps or browser extensions are installed by the users, whether that is knowingly or not. Often, these types of programs are offered through advertisements or bundled with other software, leaving the user puzzled where this software came from.
Unfortunately, some free downloads do not adequately disclose that other software will also be installed and you may find that you have installed a malicious program without your knowledge.

You should always pay attention when installing software because often, a software installer includes optional installs. Be very careful what you agree to install.
Always opt for the custom installation and deselect anything that is not familiar, especially optional software that you never wanted to download and install in the first place. It goes without saying that you should not install software that you don't trust.

To check your macOS computer for malware and remove it for free, please use the guide below.

How to remove Malware from macOS (Virus Removal Guide)

This malware removal guide may appear overwhelming due to the number of steps and numerous programs that are being used. We have only written it this way to provide clear, detailed, and easy-to-understand instructions that anyone can use to remove malware for free.
Please perform all the steps in the correct order. If you have any questions or doubt at any point, stop and ask for our assistance.

To remove all types of malware from your macOS, follow these steps:

STEP 1: Remove malicious Profiles from your Mac
STEP 2: Remove malicious apps from Mac
STEP 3: Use Malwarebytes Free to remove adware and other malware
STEP 4: Remove browser hijackers from Safari, Chrome, or Firefox

STEP 1: Remove malicious Profiles from your Mac

Profiles are used by IT admins in businesses to control the behavior of their Macs. These profiles can configure a Mac to do many different things, some of which are not otherwise possible.
When it comes to home users, adware and browser hijacker are using the configuration profile to prevent users from removing malicious programs from the computer. This also prevents the user from changing that behavior in the browser's settings.
In this first step, we will check your computer to see if any configuration profiles are installed. To do this, follow the below steps:

Open "System Preferences"

From the Apple menu, select System Preferences….
Search for "Profiles"

When the System Preferences window opens, search for the Profiles icon.

If there isn't a Profiles icon, you don't have any profiles installed, which is normal and you can continue with the next steps.
Remove the malicious profiles

If there's a Profile icon, click on it and select any suspicious profile that you want to remove, and then press the – (minus) button. Click Remove to remove the profile.

STEP 2: Remove malicious apps from your Mac

In this next step, we will try to identify and remove any malicious apps and files that might be installed on your computer.

Open "Finder"

Click the Finder application on your dock.
Click on "Applications"

In the Finder left pane, click on "Applications".
Find and remove the malicious app.

The "Applications" screen will be displayed with a list of all the app installed on your device. Scroll through the list until you find the malicious app, right-click it, and then click "Move to Trash".

Look out for any suspicious program that could be behind all the drama – anything you don't remember downloading or that doesn't sound like a genuine program. Here are some known malicious programs: TakeFresh, TopResults, FeedBack, ApplicationEvents, GeneralOpen, PowerLog, MessengerNow, ImagePrime, GeneralNetSearch, Reading Cursors, GlobalTechSearch, PDFOnline-express, See Scenic Elf, MatchKnowledge, Easy Speedtest, or WebDiscover.
Click "Empty Trash"

On the dock, right-click on the trash icon and select "Empty Trash". Doing so deletes the Trash's contents, including the program that you just sent to the Trash.
Check and remove for malicious files
- Click the desktop to make sure you're in the Finder, choose "Go" then click on "Go to Folder".
- Type or copy/paste each of the below paths into the window that opens, then click Go.
  - /Library/LaunchAgents
  - ~/Library/LaunchAgents
  - /Library/Application Support
  - /Library/LaunchDaemons
- Look out for any suspicious files that could be behind all the drama – anything you don't remember downloading or that doesn't sound like a genuine program. Here are some known malicious files: "com.adobe.fpsaud.plist" "installmac.AppRemoval.plist", "myppes.download.plist", "mykotlerino.ltvbit.plist", or "com.myppes.net-preferences.plist". When you find a malicious file move it to the Trash.

STEP 3: Use Malwarebytes Free to remove adware and browser hijackers

Malwarebytes Free is one of the most popular and most used anti-malware software for Windows, and for good reasons. It is able to destroy many types of malware that other software tends to miss, without costing you absolutely nothing. When it comes to cleaning up an infected device, Malwarebytes has always been free and we recommend it as an essential tool in the fight against malware.

Download Malwarebytes for Mac.

You can download Malwarebytes for Mac by clicking the link below.
Double-click on the Malwarebytes setup file.

When Malwarebytes has finished downloading, double-click on the setup file to install Malwarebytes on your computer. In most cases, downloaded files are saved to the Downloads folder.
Follow the on-screen prompts to install Malwarebytes.

When the Malwarebytes installation begins, you will see the Malwarebytes for Mac Installer which will guide you through the installation process. Click "Continue", then keep following the prompts in order to continue with the installation process.

When your Malwarebytes installation completes, the program opens to the Welcome to Malwarebytes screen. Click the "Get started" button.
Select "Personal Computer" or "Work Computer".

The Malwarebytes Welcome screen will first ask you on what type of computer are you installing this program, click either Personal Computer or Work Computer.
Select "Use Malwarebytes Free".

You'll be then prompted to select between the Malwarebytes Free and the Premium version. The Malwarebytes Premium edition includes preventative tools like real-time scanning and ransomware protection, however, we will use the Free version to clean up the computer.
Click on "Use Malwarebytes Free".
Click on "Scan".

To scan your computer with Malwarebytes, click on the "Scan" button. Malwarebytes will automatically update the antivirus database and start scanning your computer for malware.
Wait for the Malwarebytes scan to complete.

Malwarebytes will scan your computer for adware and other malicious programs. This process can take a few minutes, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.
Click on "Quarantine".

When the scan has completed, you will be presented with a screen showing the malware infections that Malwarebytes has detected. To remove the malicious programs that Malwarebytes has found, click on the "Quarantine" button.
Restart computer.

Malwarebytes will now remove all the malicious files that it has found. To complete the malware removal process, Malwarebytes may ask you to restart your computer.

When the malware removal process is complete, you can close Malwarebytes and continue with the rest of the instructions.

STEP 4: Remove browser hijackers from Safari, Chrome, or Firefox

Safari

Remove malicious extensions and redirects from Safari browser

Go to Safari's "Preferences".

On the menu bar, click the "Safari" menu and select "Preferences".
Check Homepage.

This will open a new window with your Safari preferences, opened to the "General" tab. Some browser hijackers may change your default homepage, so in the Homepage field make sure it's a web page you want to use as your start-up page.
Click "Extensions"

Next, click on the "Extensions" tab.
Find and uninstall the malicious extension.

The "Extensions" screen will be displayed with a list of all the extensions installed on Safari. Scroll through the list until you find the malicious extension, and then click on "Uninstall" to remove it. By default, there are no extensions installed on Safari.

Look out for any suspicious extension that could be behind all the drama – anything you don't remember installing or that doesn't sound like a genuine browser extension. Here are some known malicious extensions: TakeFresh, TopResults, FeedBack, ApplicationEvents, GeneralOpen, PowerLog, MessengerNow, ImagePrime, GeneralNetSearch, Reading Cursors, GlobalTechSearch, PDFOnline-express, See Scenic Elf, MatchKnowledge, Easy Speedtest, or WebDiscover.

If the above steps didn't help you remove the malicious extensions or redirects from Safari, you can follow the below steps:

Workaround for greyed out Safari's homepage

In some cases, after being changed by adware or malware, Safari's home page can become stuck (greyed out). You will be able to edit the Homepage field in Safari's preferences, but the change will not stick. This appears to be a bug, and there is an odd workaround. Try this:
1. In Safari, choose Preferences from the Safari menu.
2. In the window that opens, click the General icon (if necessary)
3. Enter your desired home page in the "Homepage" field, but DO NOT press return!
4. At the top of the window, click any of the other icons (eg, Tabs, AutoFill, etc).
5. You may see a prompt asking for confirmation for changing the home page. If so, confirm.
6. Switch back to the General page and check to make sure the home page has been changed.
Delete Safari's preferences file to remove malicious changes

Some malicious programs are known to install managed preferences to set the homepage and search engine settings in Safari. If the above options didn't help you remove the malicious redirects, we'll need to delete the Safari's preferences. To do this, follow the below steps:
1. Quit Safari
2. Click the desktop to make sure you're in the Finder, choose "Go" then click on "Go to Folder".
3. Type or copy/paste the following path into the window that opens, then click Go: ~/Library/Preferences/com.apple.Safari.plist
4. If the file is found, delete it, then re-open Safari

Google Chrome

Reset Google Chrome to remove malicious changes

Google Chrome has an option that will reset itself to its default settings. Resetting your browser settings will reset the unwanted changes caused by installing other programs. However, your saved bookmarks and passwords will not be cleared or changed.

Open Chrome's "Settings" menu.

Click on Chrome's main menu button, represented by three horizontal lines. When the drop-down menu appears, select the option labeled "Settings".
At the bottom, click "Advanced".

Chrome's "Settings" should now be displayed in a new tab or window, depending on your configuration. Next, scroll to the bottom of the page and click on the "Advanced" link (as seen in the below example).
Under the section "Reset," click "Reset".

Chrome's advanced settings should now be displayed. Scroll down until the "Reset and clean up" section is visible, as shown in the example below. Next, click on the "Reset settings to their original defaults" button.
Confirm by clicking "Reset".

A confirmation dialog should now be displayed, detailing the components that will be restored to their default state should you continue on with the reset process. To complete the restoration process, click on the "Reset Settings" button.

If the above steps didn't help you remove the malicious extensions or redirects from Chrome, you can follow the below steps:

Remove the unwanted policies created by malware from Chrome

In many cases, changes to Chrome may not be fixed with a simple browser reset. In such a case, it's very possible that a malicious program has created unwanted policies on your browser. You can check if any unwanted policies are loaded into the browser by typing chrome://policy into the URL bar.
To reset these policies, follow these steps:
1. Open a new Terminal window. To do this, go to Finder > Go > Utilities > Terminal
2. Enter the following commands, pressing enter after each line:
  - defaults write com.google.Chrome HomepageIsNewTabPage -bool false
  - defaults write com.google.Chrome NewTabPageLocation -string "https://www.google.com/"
  - defaults write com.google.Chrome HomepageLocation -string "https://www.google.com/"
  - defaults delete com.google.Chrome DefaultSearchProviderSearchURL
  - defaults delete com.google.Chrome DefaultSearchProviderNewTabURL
  - defaults delete com.google.Chrome DefaultSearchProviderName
  - defaults delete com.google.Chrome ExtensionInstallSources
3. After running these commands, quit Chrome if you haven't already done so, then launch it again and check chrome://policy to see if the same keys are still present (you may need to click the "Reload policies" button for changes to show up). If they're gone, you should be able to change your search engine and home page back to your preferred defaults in Chrome's settings.
Remove the "Managed by your organization" policy from Chrome

Some malicious programs are known to install managed preferences to set the home page and search engine settings in Chrome. To check for these, do the following:
1. Quit Chrome
2. Click the desktop to make sure you're in the Finder, choose "Go" then click on "Go to Folder".
3. Type or copy/paste the following path into the window that opens, then click Go: /Library/Managed Preferences/
4. Paste the below path into the window that opens, then click Go:
  Look for the following files, where [username] is your username:
  - com.google.Chrome.plist
  - [username]/com.google.Chrome.plist
  - [username]/complete.plist
  These may be legitimate, so open these files with TextEdit and see if they have links to the troublesome site in them. If they do, delete them and restart Chrome.
Uninstall Google Chrome from your computer

If the above options didn't help you remove the malicious redirects, it is easier to completely remove Chrome and all data, then reinstall the browser. To do this, click the Finder icon, from the menu bar. Choose Go, and click Go to Folder, then paste one of the below paths into the window that opens.
You will need to delete all of the below items, but before doing this be aware that this will delete all data for all Google apps you have installed, such as your bookmarks, so you will need to export them before doing this.
- /Applications/Chrome.app
- /Library/Application Support/Google/
- /Library/Google/
- ~/Library/Application Support/Google/
- ~/Library/Google/
- ~/Library/Preferences/com.google.Chrome.plist
Note: The "~" indicates that it's the current user's Library which is often invisible in recent versions of macOS. To get to it you must hold down the Option (sometimes labeled Alt) key down and select Library from the Finder's Go menu.

After deleting all of the above files, restart your device. You can now download and re-install Google Chrome on your device. You will need to import any exported bookmarks or other data, and may need to reinstall any other Google apps that you use.

Mozilla Firefox

If you're having problems with Firefox, resetting it can help. The reset feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks, passwords, web form auto-fill information, browsing history and open tabs.

Go to the "Help" menu.

Click on Firefox's main menu button, represented by three horizontal lines. When the drop-down menu appears, select the option labeled "Help".
Click "Troubleshooting Information".

From the Help menu, click on "Troubleshooting Information".

If you're unable to access the "Help" menu, type about:support in your address bar to bring up the Troubleshooting information page.
Click on "Refresh Firefox"

Click the "Refresh Firefox" button in the upper-right corner of the "Troubleshooting Information" page.
Confirm.

To continue, click on the "Refresh Firefox" button in the new confirmation window that opens.
Click on "Finish".

Firefox will close itself and will revert to its default settings. When it's done, a window will list the information that was imported. Click on the "Finish".

Your old Firefox profile will be placed on your desktop in a folder named "Old Firefox Data". If the reset didn't fix your problem you can restore some of the information not saved by copying files to the new profile that was created. If you don't need this folder any longer, you should delete it as it contains sensitive information.

Your computer should now be free of malicious programs. If your current antivirus allowed a malicious program on your computer, you may want to consider purchasing the full-featured version of Malwarebytes Anti-Malware to protect against these types of threats in the future.
If you are still experiencing problems while trying to a malicious program from your computer, please ask for help in our Mac Malware Removal Help & Support forum.