Remove MainSearchSignal (Mac OS)

The contents of this article is concentrated on the description and removal of hazardous browser extension named MainSearchSignal. The page also contains useful Quick Fix to remove the threat, Removal Steps, as well as Homepage and Search Cleanup.

MainSearchSignal is an adware that is presently targeting Mac computers. Findings states that this unwanted program exhibits unusual behavior in the browser program such as pop-ups and redirects. The main objective of adware like MainSearchSignal is to carry out unauthorized modifications in the browser application. This alteration is going to manifest on the homepage as well as the default search engine, which will be utilizing an unwanted web address. In addition, the mere presence of MainSearchSignal app could cause excessive ads and redirect that meant to drive the browser to malicious online pages.

Sneaky installation of MainSearchSignal app

The majority of Mac users who encountered this malicious application are unaware how it gets inside the computer. This means that they are still oblivious of the fact that MainSearchSignal is bundled to various freeware and shareware. Things like free media player, games, tools, file converter, creativity suites, and similar cost-less apps can lead to the MainSearchSignal adware infection.

Beside the mentioned sources, Mac users are also exposed to other misleading techniques of cyber crooks. Those who frequently visits media streaming or file-download websites are likely the target of this adware. In this kind of attack, the visited website is going to pop-up an urgent software update telling Mac users to act at once to avoid software conflicts. Unknown to them, this is just a pop-up ad that is in disguise – a fake software update indeed. Clearly, installing this fake update achieves the sneaky loading of MainSearchSignal app on the browser program.

Screenshot of MainSearchSignal App

The risks of having MainSearchSignal

We can compare this threat to other adware as MacWebSearchSmart, Vpnagentd, PrimarySearchService, and many more. These unwanted applications were able to execute unwanted changes in the internet browser program. It will have visible signs on the homepage and search engine. Hence, there are unseen operation that is hidden to users. MainSearchSignal secretly gathers browsing data, including visited pages, favorite websites, search keywords, IP address, and network settings.

Knowing that MainSearchSignal is a risk to Mac users online privacy and security, we highly encourage immediate removal of this unwanted browser extension. Complete guide to accomplish the elimination of MainSearchSignal app is posted on the next segment.

Procedures to Remove MainSearchSignal from Mac

This area contains comprehensive procedures to help you remove adware and potentially unwanted program from the computer.

Guide on this page are written in a manner that can be easily understand and execute by Mac users.

Quick Fix - Scan the Mac Computer with Combo Cleaner

Combo Cleaner is a trusted Mac utility application with complete antivirus and optimization features. It is useful in dealing with adware, malware, and PUP's. Moreover, it can get rid of adware like MainSearchSignal. You may need to purchase full version if you require to maximize its premium features.

1. Download the tool from the following page:

2. Double-click the downloaded file and proceed with the installation.

3. In the opened window, drag and drop the Combo Cleaner icon onto your Applications folder icon.

Install Combo Cleaner

4. Open your Launchpad and click on the Combo Cleaner icon.

5. Wait until antivirus downloads its latest virus definition updates and click on "Start Combo Scan" to start removing MainSearchSignal.

Combo Cleaner Scanner

6. Free features of Combo Cleaner include Disk Cleaner, Big Files finder, Duplicate files finder, and Uninstaller. To use antivirus and privacy scanner, users have to upgrade to a premium version.

Proceed with the rest of the removal steps if you are comfortable in manually removing malicious objects associated with the threat.

Step 1 : Delete MainSearchSignal from Mac Applications

1. Go to Finder.

2. On the menu, click Go and then, select Applications from the list to open Applications Folder.

3. Find MainSearchSignal or any unwanted program.

Delete Unwanted App

4. Drag MainSearchSignal to Trash Bin to delete the application from Mac.

5. Right-click on Trash icon and click on Empty Trash.

Step 2 : Remove Browser Extensions that belongs to MainSearchSignal

1. Locate the add-on or extension that is relevant to the adware. To do this, please follow the following depending on affected browser.

Safari - Choose Preferences from the Safari menu, then click the Extensions icon. This will open a window showing all installed extensions.

Chrome - Select Preferences from the Chrome menu, and then click the Extensions link found on the left pane.

Firefox - Choose Add-ons from the Menu. Look at both the Extensions and Plug-ins lists when it opens a new window.

2. Once you have located MainSearchSignal, click on Remove or Uninstall, to get rid of it.

3. Close the browser and proceed to the next steps.

Step 3 : Delete Malicious Files that have installed MainSearchSignal

1. Select and copy the string below to your Clipboard by pressing Command + C on your keyboard.

~/Library/LaunchAgents

2. Go to your Finder. From the menu bar please select Go > Go to Folder...

3. Press Command + V on your keyboard to paste the copied string. Press Return to go to the said folder.

Command + V

4. You will now see a folder named LaunchAgents. Take note of the following files inside the folder:

  • com.MainSearchSignal
  • unknown.download.plist
  • unknown.ltvbit.plist
  • unknown.update.plist

The term unknown is just a representation of the actual malware name. Attackers may masks the actual name with following:

- Main Search Signal

If you cannot find the specified file, please look for any unfamiliar or suspicious entries. It may be the one causing MainSearchSignal to be present on your Mac. Arranging all items to see the most latest ones may also help you identify recently installed unfamiliar files. Please press Option + Command + 4 on your keyboard to arrange the application list in chronological order.

Option+Command+4

Important: Take note of all the suspicious files as you may also delete the same item on another folder as we go on.

5. Drag all suspicious files that you may find to Trash.

6. Please restart the computer.

7. Open another folder using the same method as above. Copy and Paste the following string to easily locate the folder.

~/Library/Application Support

8. Look for any suspicious items that are similar to the ones in Step 4. Drag them to the Trash.

9. Repeat the process on the following non-hidden folders (without ~):

/Library/LaunchAgents
/Library/LaunchDaemons
/Library/Application Support

10. Lastly, go to your Finder and open the Applications Folder. Look for subfolders with the following names and drag them to Trash.

- Main Search Signal

Optional : For locked files that cannot be removed, do the following:

1. Go to Launchpad, Utilities folder, open Activity Monitor.

2. Select the process you want to quit.

Force Quit Apps

3. Click on Force Quit button.

4. You may now delete or remove locked files that belongs to MainSearchSignal adware.

Step 4 : Double-check with MBAM Tool for Mac

1. Download Malwarebytes Anti-malware for Mac from this link:

2. Run Malwarebytes Anti-malware for Mac. It will check for updates and download if most recent version is available. This is necessary in finding recent malware threats including MainSearchSignal.

3. If it prompts to close all running web browser, please do so. Thus, we advise you to PRINT this guide for your reference before going offline.

4. Once it opens the user interface, please click on Scan button to start scanning your Mac computer.

MBAM for Mac

5. After the scan, Malwarebytes Anti-malware for Mac will display a list of identified threats, MainSearchSignal is surely part of it. Be sure to select all items in the list. Then, click Remove button to clean the computer.

Step 5 : Remove MainSearchSignal from Homepage and Search

Safari

- Open your Safari browser.
- Go to Safari Menu located on upper left hand corner, and then select Preferences.
- Under General tab, navigate to Default Search Engine section and select Google or any valid search engine.
- Next, be sure that "New Windows Open With" field is set to Homepage.
- Lastly, remove MainSearchSignal from the Homepage field. Replace it with your preferred URL to be set as your default homepage.

Google Chrome

- Open Chrome browser.
- Type the following on the address bar and press Enter on keyboard : chrome://settings/
- Look for 'On Startup' area.
- Select 'Open a specific page or set of pages'.
- Click on More Actions and select Edit.
- Enter the desired web address as your home page, replacing MainSearchSignal. Click Save.
- To set default search engine, go to Search Engine area.
- Click on 'Manage search engines...' button.
- Go to questionable Search Engine. Click on More Actions and Click 'Remove from list'.
- Go back to Search Engine area and choose valid entry from Search engine used in the address bar.

Mozilla Firefox

- Run Mozilla Firefox browser.
- Type the following on the address bar and hit Enter on keyboard : about:preferences
- On Startup area, select 'Show your home page' under 'When Firefox starts' field.
- Under Home Page field, type the desired URL to replace MainSearchSignal settings.
- To configure default search engine, select Search on left sidebar to display settings.
- Under Default Search Engine list, please select one.
- On the same page, you have an option to Remove unwanted search engine.

Optional : If unable to change browser settings, execute these steps:

Some user complains that there is no way to change browser settings because it is grayed out by MainSearchSignal. In such situation, it is important to check if there is unwanted profile. Please do the following:

1. Quit any running applications and launch System Preferences from your Dock.

2. Under System Preferences, click Profiles.

3. Select MainSearchSignal or any relevant profile from the left pane. See image below.

Remove Profile

4. At the bottom of this window, click minus [-] button to delete the account. Please refer to image above.

5. Close the Profiles window and open the affected browser to change all settings associated with MainSearchSignal.

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