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How to uninstall MainSignSearch from the operating system

Also Known As: Ads by MainSignSearch
Type: Mac Virus
Damage level: Medium

What kind of software is MainSignSearch?

MainSignSearch is an untrustworthy application distributed via a deceptive page. Our team discovered MainSignSearch after using a fake installer. While examining this app, we found that it displays unwanted advertisements. Therefore, we classified MainSignSearch as adware.

MainSignSearch adware

MainSignSearch adware in detail

MainSignSearch shows annoying advertisements that can open potentially malicious web pages. Clicking those ads can lead to phishing websites (pages asking to provide sensitive information), technical support scam sites (pages urging to call fake technical support numbers), websites offering to download untrustworthy software, etc.

Also, ads displayed by MainSignSearch may be designed to run certain scripts to download and (or) install unwanted apps. Thus, it is strongly recommended not to trust MainSignSearch or ads coming from it. Another reason to avoid installing MainSignSearch is that it can be designed to gather sensitive information.

After examining many apps similar to MainSignSearch, our team learned that some of them can read credit card details, passwords, and other personal data. Also, they can be designed to hijack web browsers (change browser's settings to promote fake search engines or shady websites).

Threat Summary:
Name Ads by MainSignSearch
Threat Type Adware, Mac malware, Mac virus
Detection Names Avast (MacOS:Adload-AD [Trj]), Combo Cleaner (Gen:Variant.Adware.MAC.Adload.14), ESET-NOD32 (A Variant Of OSX/TrojanDownloader.Adload.AD), Kaspersky (Not-a-virus:HEUR:AdWare.OSX.Cimpli.k), Full List (VirusTotal)
Additional Information This application belongs to Adload malware family.
Symptoms Your Mac becomes slower than normal, you see unwanted pop-up ads, you are redirected to dubious websites.
Distribution methods Deceptive pop-up ads, free software installers (bundling), fake Flash Player installers, torrent file downloads.
Damage Internet browser tracking (potential privacy issues), display of unwanted ads, redirects to dubious websites, loss of private information.
Malware Removal (Mac)

To eliminate possible malware infections, scan your Mac with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
▼ Download Combo Cleaner for Mac
To use full-featured product, you have to purchase a license for Combo Cleaner. Limited seven days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

Adware in general

Advertising-supported software bombards users with intrusive advertisements. In addition to displaying ads, adware can hijack a web browser and collect information. It is common for adware to be distributed using deceptive methods (e.g., scare tactics). Thus, users download and install software of this type inadvertently.

More adware examples are EssentialModule, ModuleUpgrade, and GeneralOperation.

How did MainSignSearch install on my computer?

MainSignSearch is distributed via a fake installer mimicking the installer for Adobe Flash Player. In most cases, users download such installers from websites claiming that certain installed software is outdated or instructing them to install "required" software. It is important to know that fake/deceptive installers can be malicious.

Adware is also distributed via software bundles or untrustworthy advertisements. When adware is included in installers, users install adware when they finish installations without changing "Advanced", "Custom", or other provided settings.

How to avoid installation of unwanted applications?

Download software from reliable sources such as official websites and the Apple App Store. Avoid downloading software from third-party stores, unofficial pages, third-party downloaders, P2P networks, and similar sources. Always check downloaders and installers for unwanted apps and deselect them.

Do not trust advertisements on questionable websites or agree to receive notifications from such web pages. If your computer is already infected with MainSignSearch, we recommend running a scan with Combo Cleaner Antivirus for macOS to automatically eliminate this adware.

IMPORTANT NOTE! Rogue setups/apps that promote the MainSignSearch adware are designed to create a new device profile. Therefore, before taking any further removal steps, perform these actions:
1) Click the "Preferences" icon in the menu bar (Dock) and select "Profiles".

Remove malicious profiles added by MainSignSearch (step 1)

2) Locate all suspicious profiles and delete them.

Remove malicious profiles added by MainSignSearch (step 2)

3) Perform a full system scan with Combo Cleaner anti-virus suite.

After performing these actions, you can proceed with further removal steps for this adware/browser hijacker.

Instant automatic Mac malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of Mac malware. Download it by clicking the button below:
▼ DOWNLOAD Combo Cleaner for Mac By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. Limited seven days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.

Quick menu:

Video showing how to remove MainSignSearch adware using Combo Cleaner:

MainSignSearch adware removal:

Remove MainSignSearch-related potentially unwanted applications from your "Applications" folder:

Manual removal of malicious Mac applications

Click the Finder icon. In the Finder window, select "Applications". In the applications folder, look for "MPlayerX", "NicePlayer", or other suspicious applications and drag them to the Trash. After removing the potentially unwanted application(s) that cause online ads, scan your Mac for any remaining unwanted components.

Remove adware-related files and folders

Mac Go To Folder step

Click the Finder icon, from the menu bar. Choose Go, and click Go to Folder...

Mac removing related files and folders - step 1Check for adware generated files in the /Library/LaunchAgents/ folder:

Mac go to /Library/LaunchAgents - step 1

In the Go to Folder... bar, type: /Library/LaunchAgents/

Mac go to /Library/LaunchAgents - step 2

In the "LaunchAgents" folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - "installmac.AppRemoval.plist", "myppes.download.plist", "mykotlerino.ltvbit.plist", "kuklorest.update.plist", etc. Adware commonly installs several files with the exact same string.

Mac removing related files and folders - step 2Check for adware generated files in the ~/Library/Application Support/ folder:

Mac go to /Library/Application Support - step 1

In the Go to Folder... bar, type: ~/Library/Application Support/

Mac go to /Library/Application Support - step 2

In the "Application Support" folder, look for any recently-added suspicious folders. For example, "MplayerX" or "NicePlayer", and move these folders to the Trash.

Mac removing related files and folders - step 3Check for adware generated files in the ~/Library/LaunchAgents/ folder:

Mac go to ~/Library/LaunchAgents - step 1

In the Go to Folder... bar, type: ~/Library/LaunchAgents/

Mac go to ~/Library/LaunchAgents - step 2

In the "LaunchAgents" folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - "installmac.AppRemoval.plist", "myppes.download.plist", "mykotlerino.ltvbit.plist", "kuklorest.update.plist", etc. Adware commonly installs several files with the exact same string.

Mac removing related files and folders - step 4Check for adware generated files in the /Library/LaunchDaemons/ folder:

Mac go to /Library/LaunchDaemons - step 1

In the "Go to Folder..." bar, type: /Library/LaunchDaemons/

Mac go to /Library/LaunchDaemons - step 2

In the "LaunchDaemons" folder, look for recently-added suspicious files. For example "com.aoudad.net-preferences.plist", "com.myppes.net-preferences.plist", "com.kuklorest.net-preferences.plist", "com.avickUpd.plist", etc., and move them to the Trash.

Mac removing malware related files and folders - step 5Scan your Mac with Combo Cleaner:

If you have followed all the steps correctly, your Mac should be clean of infections. To ensure your system is not infected, run a scan with Combo Cleaner Antivirus. Download it HERE. After downloading the file, double click combocleaner.dmg installer. In the opened window, drag and drop the Combo Cleaner icon on top of the Applications icon. Now open your launchpad and click on the Combo Cleaner icon. Wait until Combo Cleaner updates its virus definition database and click the "Start Combo Scan" button.

Mac remove malware with Combo Cleaner - step 1

Combo Cleaner will scan your Mac for malware infections. If the antivirus scan displays "no threats found" - this means that you can continue with the removal guide; otherwise, it's recommended to remove any found infections before continuing.

Mac remove malware with Combo Cleaner - step 2

After removing files and folders generated by the adware, continue to remove rogue extensions from your Internet browsers.

Remove malicious extensions from Internet browsers

Safari iconRemove malicious Safari extensions:

Removal of malicious extensions in Safari - step 1

Open the Safari browser, from the menu bar, select "Safari" and click "Preferences...".

Removal of malicious extensions in Safari - step 2

In the preferences window, select "Extensions" and look for any recently-installed suspicious extensions. When located, click the "Uninstall" button next to it/them. Note that you can safely uninstall all extensions from your Safari browser - none are crucial for regular browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Safari.

Google Chrome logoRemove malicious extensions from Google Chrome:

Removal of malicious extensions in Google Chrome - step 1

Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome), select "More Tools" and click "Extensions". Locate all recently-installed suspicious extensions, select these entries and click "Remove".

Removal of malicious extensions in Google Chrome - step 2

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Google Chrome.

Mozilla Firefox logoRemove malicious extensions from Mozilla Firefox:

Removal of malicious extensions in Mozilla Firefox - step 1

Click the Firefox menu firefox menu icon (at the top right corner of the main window) and select "Add-ons and themes". Click "Extensions", in the opened window locate all recently-installed suspicious extensions, click on the three dots and then click "Remove".

Removal of malicious extensions in Mozilla Firefox - step 2

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Mozilla Firefox.

Frequently Asked Questions (FAQ)

What harm can adware cause?

Usually, the main problems with having adware installed are diminished web browsing experience and slower computer performance.

What does adware do?

Advertising-supported applications show intrusive advertisements. They can also be designed to promote fake search engines (by hijacking web browsers) and collect various data.

How do adware developers generate revenue?

It is common for adware to be monetized via affiliate programs. Adware developers promote various pages, products, services, etc.

Will Combo Cleaner remove MainSignSearch adware?

Combo Cleaner will scan your computer and remove adware and other unwanted software. It is recommended to remove adware with specialized software to avoid leaving any file leftovers in the system (which can happen after a manual removal).

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

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To use full-featured product, you have to purchase a license for Combo Cleaner. Limited seven days free trial available. Combo Cleaner is owned and operated by Rcs Lt, the parent company of PCRisk.com read more.