LeadingLibrary is part of potentially unwanted application (PUA) family where it features undesirable advertisements including pop-up, redirects, or banners in the browser window. This is a computer threat that is targeting Mac systems and makes its operations doable by executing unnecessary changes in the browser configuration. Actors behind LeadingLibrary can make online revenue via commercials and traffic recommendations. Hence, to increase their profit even more, these cyber crooks will bombard the browser with huge amount of ads.
LeadingLibrary Adware Signs of Infection
If LeadingLibrary has infected the internet program, it may function differently. This is because LeadingLibrary can alter various browsers settings without the intent of Mac users. LeadingLibrary handles the behavior of browsers, as it can obtain and execute malicious programs and load it automatically as Extension. A mixture of pop-ups may show up that intends to redirect web user to unreliable websites such as adult oriented pages, online gaming, fake surveys, and so on. Extra icons may also manifest on the browser and Applications folder of Mac systems. Furthermore, because the subject is an unknown application, the affected system may show up a warning that “Leading Library may damage your computer.”
How does LeadingLibrary gets inside your Mac?
Malicious software bundles available from different file download sites and repositories are the usual causes of adware or malware infection. Developers tend to spread their hazardous apps by embedding them in software bundles, like freeware and shareware. Since the adware has malicious intention on the target computer, the developers have not conceded appropriately how this program will function once installed on Mac. It is an opportunity for developers to inject their program without the comprehension of Internet users. Another possible method to infiltrate the computer is through misleading ads, where it can run scripts to download LeadingLibrary app and execute an instant integration to the browser program. The same approach is used to deploy similar adware like SkilledObject, WebsyncSearch, and StandardBoost.
To avoid coming across this adware while installing freeware or any third party applications, Mac user should opt for ‘Advanced’ or ‘Custom’ installation method. Via these modes, additional unnecessary apps can be excluded and avoid it from infiltrating the Mac device.
Procedures to Remove LeadingLibrary 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 LeadingLibrary. 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.
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 LeadingLibrary.
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 LeadingLibrary 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 LeadingLibrary or any unwanted program.
4. Drag LeadingLibrary 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 LeadingLibrary
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 LeadingLibrary, 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 LeadingLibrary
1. Select and copy the string below to your Clipboard by pressing Command + C on your keyboard.
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.
4. You will now see a folder named LaunchAgents. Take note of the following files inside the folder:
The term unknown is just a representation of the actual malware name. Attackers may masks the actual name with following:
- Leading Library, SkilledObject
If you cannot find the specified file, please look for any unfamiliar or suspicious entries. It may be the one causing LeadingLibrary 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.
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.
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 ~):
10. Lastly, go to your Finder and open the Applications Folder. Look for subfolders with the following names and drag them to Trash.
- Leading Library, SkilledObject
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.
3. Click on Force Quit button.
4. You may now delete or remove locked files that belongs to LeadingLibrary 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 LeadingLibrary.
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.
5. After the scan, Malwarebytes Anti-malware for Mac will display a list of identified threats, LeadingLibrary 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 LeadingLibrary from Homepage and Search
- 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 LeadingLibrary from the Homepage field. Replace it with your preferred URL to be set as your default homepage.
- 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 LeadingLibrary. 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.
- 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 LeadingLibrary 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 LeadingLibrary. 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 LeadingLibrary or any relevant profile from the left pane. See image below.
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 LeadingLibrary.