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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.

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To start checking your Mac for viruses, click Add Folder and select the directories or individual files you want to check; you can also manually drag and drop the appropriate folders or files. Nov 21, 2018  Step 3: Scan for and remove Basesystem.dmg Virus. Files from your MacWhen you are facing problems on your Mac as a result of unwanted scripts and programs such as Basesystem.dmg Virus, the recommended way of eliminating the threat is by using an anti-malware program. Beneath its deceptively simple design lies a powerful virus cleaner that works in real-time to detect and remove not only Mac-specific viruses and spyware, but PC and mobile threats, too. So AVG AntiVirus not only helps protect all that’s important on your Mac, it also prevents you from infecting friends on.

HouseCall 7.1 provides an easy, on-demand check for active viruses and other malware. It complements, but is not a substitute for, existing security software that provides proactive protection and continuously scans and monitors for threats.

Mac malware: The symptoms

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.

Tip
Do a quick search for virus-infected .DMG files within your Downloads. The potential culprits could be recently downloaded files, especially media-related ones. Delete them and empty the Trash bin.

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:

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  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.

Tip
Hold the Shift key when starting a new Safari session. This way all your previous tabs (including the ad pop-up) will not be reopened.

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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.

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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 have enjoyed a long run of fairly virus-free computing, but it shouldn’t be taken for granted that there is no virus. While Apple has kept a close grip in the App Store, some malware, on rare occasions, still make it up there. Likewise, the macOS Gatekeeper is only useful when you do not override its settings, but that will restrict you to only install apps from the App store. So if you download an app that didn’t come from the App Store, how can you check whether it is safe to install?

About Suspicious Package

Suspicious Package is a special-purpose utility program designed to check macOS packages – software files that install application programs. Packages typically contain several components, including the app itself, scripts that automate the installation process, and other files the program needs. Although the macOS packaging system is an efficient way for developers to organize all the pieces that go into an app, it’s also possible for hackers to subvert it by inserting their own malicious programming. Suspicious Package allows you to inspect the contents of any macOS package, potentially heading off a malware infection.

Download and Installation

The Suspicious Package app is available for download directly from mothersruin.com. To install it, you may have to temporarily bypass the macOS Gatekeeper which normally prevents you from installing non-App Store programs by accident. In “System Preferences” go to “Security & Privacy -> General -> Allow apps downloaded from:” and change the setting to “App Store and identified developers.” When you open the Suspicious Package dmg file, you’ll see the warning, “SuspiciousPackage.dmg blocked from opening because it is not from an identified developer.” Click the “Open Anyway” button to install the program.

Quick Look

The “Quick Look” feature displays a package summary from the Finder without having to launch the Suspicious Package app itself. This is a handy time-saver if you have several packages to check. To use Quick Look, highlight the package you want to evaluate from the Finder, then find the Quick Look item in the Finder’s File menu, or press “command + Y.”

Check a Package

To check a package you’ve downloaded, launch Suspicious Package. From the “File” menu, select “Open,” then browse your Downloads or other folder for a package file to inspect. Suspicious Package analyzes the file, then displays a set of tabs: “Package Info,” “All Files,” and “All Scripts.” If the app detects problems with the package, the Review icon indicates a warning.

Package Info

The Package Info tab gives an overview of what’s in the package. It shows how many items are installed, how many scripts it uses, and whether it is signed or not. It lists when the package was downloaded and the browser name. Finally, if the package has problems, Package Info shows the number of warnings given.

All Files

Resembling a Finder window, All Files shows all the files stored in the package, including the application itself, supporting files, and folder organization. Click on any folder to see its contents.

All Scripts

The All Scripts tab lists all the macOS shell scripts used to install the package. Each script is a mini-program containing text commands used to copy, create, and delete files. Click on a script name to see the instructions. The File menu includes options to edit a script, should you want to.

Unsigned Packages

When using Suspicious Package, you may see a warning that says the package isn’t signed. Package signing is a feature Apple developed so software developers can “stamp” their programs with a digital signature officially tying the application to the people who wrote it. The signature gives confidence that the software is legit and not a cheap knock-off. In fact, Apple requires signatures for all software in the App Store. Some developers, however, don’t spend the extra effort needed to sign their software. Many unsigned packages, including open-source and freeware programs, are actually okay to use. On the other hand, if you’re buying Mac software from a major vendor, the absence of a signature is a big red flag.

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Conclusion

The vast majority of Mac programs are free of malware. However, programs downloaded from third-party sites carry a small risk of spyware and other unwanted baggage. Though primarily aimed at technical users, Suspicious Package lets anyone evaluate macOS software for malware and other problems. The app clearly reveals the contents of a software package before you install it. Especially for Mac people who don’t use the App Store as their only source for software, Suspicious Package makes a worthy addition to your Mac toolbox.