According to Malwarebytes, 2019 saw a 230% spike in malware activity within the Mac ecosystem. The notable examples include Proton Remote Access Trojan and the KeRanger virus. But whatever is that ends with “-ware” on your Mac — ransomware, adware, malware, or scareware — we’ll share a couple of methods to delete it. So, welcome to our Mac Malware Removal Guide.

Mac malware: The symptoms

Mac OS X can experience difficulty deleting certain files due to the following (and other) reasons: The file is in use by an application or system process. The file is locked. The user does not have permission to delete the file. The file is damaged or otherwise corrupt and 'cannot be found' by the system.

Oftentimes a malware app would trick you into believing it’s perfectly harmless. Such apps are known to disguise themselves as antiviruses, extractors or video players. But how to check your Mac for viruses? Here are some of the tell-tale signs:

• A sudden drop in Mac’s performance or frequent freeze-ups.
• Pages that you visit get obscured with ads.
• Unexpected Mac reboots or apps starting for no reason.
• Your browser installs suspicious updates automatically.

How to remove a virus from Mac

Just as with any disease, to doctor a virus you need to remove the infected part of your software — as simple as that.

Remove malware from Mac manually

If you know which app on your Mac is malicious, you’re half-way through the problem. First of all, you need to close the app and then root it out from the system processes.

1. Open Activity Monitor (type its name in the Launchpad).
2. Locate the problematic app in the Processes.
3. Use [x] button to quit the process

Now go back to your Applications and move the app to the Trash bin. Immediately empty the Trash.

This method is simple, but for the best malware removal results, you’d have to invest a bit more time. There are still parts and pieces of the virus app scattered around your system folders. It’s a bit like killing a dragon that re-grows its head after you’ve chopped it off. To remove malware from your Mac completely, it’s better to use a powerful uninstaller.

Get rid of malware using CleanMyMac X

CleanMyMac X has a 10-year reputation of guarding Macs around the world. The app will scan your Mac for any vulnerabilities and offer immediate removal if it finds something suspicious. CleanMyMac detects thousands of malware threats, including viruses, adware, spyware, ransomware, cryptocurrency miners, and more. The app’s database is regularly updated to keep all those “-wares” away from your Mac.

Here’s how to remove malware from your Mac:

1. Download CleanMyMac X — it’s free to download.
2. Click Malware Removal tab.
3. Click Scan.
4. Click Remove.
5. Done!

How to remove Mac Adware cleaner

Ironically, the app called “Mac Adware cleaner” maybe itself be the very source of annoying adware on your Mac — the classic case of a wolf in a sheep’s skin. To remove it, you can use CleanMyMac (which is a legit app that has a 4.5-star rating from MacWorld magazine). Additionally, you can browse through your Login Items list to stop any dubious apps from auto-launching. Below is how to do it.

Remove Mac malware from your Login Items

Most adware or spyware will try to sneak inside the bootup process. Good news, you don’t have to be Kaspersky to prevent this.

1. Go to the Apple menu > System Preferences.
2. Choose Users & Groups section.
3. Make sure if your username is highlighted.
4. Open Login Items tab.

Now use the “—” sign to disable all the suspicious apps (like Mac Defenders) that you’ll find. Restart your Mac for the changes to take place.

How to get rid of pop-up ads on Mac

Advertising pop-ups are browser-related, so whatever browser you are using, be prepared for a thorough cleanup. First off, don’t buy into whatever the ad is telling you. Some scary alerts would mention 343 viruses found on your Mac forcing you to immediately install a “Mac Defender” or “Mac Security” tool. Just ignore it and don’t click anywhere on the pop-up. Use [x] button and if it doesn’t close the ad, Ctrl + click the browser icon to quit the browser completely.

How to block pop-up ads in Safari

1. Open Safari preferences (in the top menu).
2. Go to the Security tab.
3. Tick “Block pop-up windows”.

How to get rid of pop-ups in Chrome

1. Open Chrome Settings (a three-dot icon)
2. Click Advanced
3. Go to Privacy and security > Content setting
4. Locate the Popups tab and block them from appearing

Additionally, make sure your browser’s homepage is set to standard Google page or other trusted source.

Clean up extensions to remove adware from Mac

Apple lists several browser extensions as potentially malicious. The list includes:

• Amazon Shopping Assistant by Spigot Inc.
• Slick Savings by Spigot Inc.
• FlashMall
• Cinema-Plus

This is just to give you an idea of how different these adware extensions could be. But if you’re looking at how to remove malware from the Mac Safari browser, follow this path.

Remove extensions in Safari

1. Go to Safari Preferences
2. Choose the Extensions tab
3. Select an extension and click Uninstall

Disable browser extensions in Chrome

And here’s how to remove malware from Mac Chrome. Open Chrome and click Window in the top menu. In the bottom of the list choose Extensions. This opens up the list of all your installed extensions. Now use a trash bin icon to remove the ones you suspect are adware viruses. Right after that, your Chrome experience should get much less distracting.

Just to be doubly sure, we recommend you to remove all the extensions you'll find. Later you can re-install each one separately.

Launch Agents and Daemons: Where else to look

So far we’ve covered browser Extensions, Applications, and Login Items trying to remove malware from your Mac. But these are not the only locations where malicious agents may be hiding. Another type of system services that could be affected by malware are the so-called Launch Agents and Daemons — yes, the name does derive from the word demon. These are small helper programs that stealthily run in the background, like software updaters or automatic backups.

While Launch Agents and Daemons are two different entities, both can be infiltrated by malware. As it often happens, trojan apps would place their executable files within the Launch Agents folder. The result — the virus app launches automatically and potentially harms or steals your data.

How to remove daemons and agents from the Mac’s startup

1. Click Finder.
2. Choose Go > Go to Folder.
3. Type in: /Library/LaunchDaemons

For Launch Agents, repeat the steps above, but this time search in 2 more locations:

/Library/LaunchAgents

~/Library/LaunchAgents

Inside you’ll find a bunch of PLIST files and if some of them look suspicious to you, delete them. Sure, the names of these files may not be very telling, but if you already know the problematic app that you are after, knowing this folder may help you fully extinguish it.

Don’t forget to reboot your Mac — until you do, all these files are still in memory.

One more way to remove daemons, agents, and plug-ins

If the manual path described here sounds too complicated, you can again be rescued by CleanMyMac X. This app has a special tool to remove malware Launch Agents.

1. Download CleanMyMac X (it’s free to download).
2. Install the app.
3. Click Optimization tab > Launch Agents
4. Click Perform.

By the way, this app has a real-time anti-malware monitor. It monitors for any problematic apps that try to get into your Launch Agents. If it finds such, it will notify you and offer to remove the intruder.

If all else fails

Below a few more ideas to help you remove malware from Mac.

• Switch to a different user account and do a full system cleanup.
• Restore your Mac using Time Machine (to the point before it got infected).
• Update all your software, including the macOS.

OK, looks we’ve covered how to remove malware from Mac including both manual and software solutions. Hope your Mac stays virus-free and may you never click on those scary Mac alerts again.

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Mac users often find their Downloads folder filled with disk images that they previously downloaded from the internet, files that – having already installed the apps – they forgot to delete after unmounting the image. As you may already know, installer files for macOS come with a DMG file extension – otherwise known as an Apple Disk Image – and are similar to ISO files.

To install an app – the majority of which just require dragging and dropping – users need to mount this .DMG file just as you might mount a CD when putting it into a CD drive, which makes its contents visible on the Mac. The required software is packed into a special bundle and carries an invisible “.APP” extension.

Users tend to forget about the existence of these disk images after they install the software. The same is true for iOS installer files (IPSW), although using .IPSW to apply an iOS software update is considered to be a more advanced function and therefore more appropriate for tech-savvy users. Even so, it can still happen that even advanced users forget about these storage-hungry installer files.

How to Remove Installer Files

Having one or two installer files in the Downloads folder shouldn't cause any issues unless these files occupy gigabytes of space – Adobe Creative Suite installer packages, for example. But when you realize that your Mac is running out of free space, this is a good place to check for the remains of installer files to remove them and save space.

Removing these files is as easy as the installation process: select the file and drag it to the Trash. There are cases where the software is more complex, such as Adobe's suite of programs or Mac optimization software OnyX's installer files. If this is the situation, just open the disk image and look for an uninstaller file, or launch the app and find the uninstall options. The uninstall process may differ by app, but in most cases it is hassle-free.

Most Common Issues When Removing Installer Files

The drag and drop removal method, however, may leave some junk data behind since it doesn't remove the supporting files, which, if you frequently install and uninstall apps, may end up eating into your Mac's storage.

Ever since macOS Sierra 10.12, Apple has provided users with the option to trash the installer as soon as its function is finished, a pretty handy feature considering the limited disk space on a 128GB MacBook Air.

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Fortunately, Mac optimization apps such as CleanMyMac and others include a neat uninstaller utility that helps remove all files associated with the application and its temporary installation files. While this feature won’t remove the installation file, it does find the files associated with specific software after selecting the app(s) that you want removed.

Installer files are easier to remove because they can be considered as .ZIP files. To move the installer to the Trash, however, you should first unmount it, otherwise it will display an error message. After unmounting it, locate the file (usually in the Downloads folder, the default location for files downloaded from the web), and simply press the Command + Backspace keys or drag it into the trash can.

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