Remove CommonOptimization from Mac OS

CommonOptimization is an Adware type of computer threat that is also listed under the list of potentially unwanted application (PUA). It mainly targets internet applications that are operating on Mac OS environment and the primary objective is to display different types of online ads. Pop-ups, banners, and push notifications would endlessly appear on the internet browser program and it persists as long as CommonOptimization app is locally present.

Like older variants as AdjustableSkill and OptimalSync, existence of CommonOptimization has adverse effect on Mac computer and it negatively affects online user’s browsing and searching experience. As what adware would normally do, CommonOptimization displays excessive number of advertisements to direct web users to sponsored online pages. It also initiates series of redirects that could land the browser program to unnecessary random pages like online gambling sites, adult pages, fake surveys, online phishing and so on. As a result of these unusual browser actions, the performance of internet application might degrade and could end up on software freezes or crashes.

Origin of CommonOptimization Infection

Software bundling hoax is frequently the source of adware infection. It is likely that Mac users have obtained CommonOptimization from this misleading method. Via this approach, adware makers are embedding the adware code to various freeware and uploads them to random online servers. Definitely, those that are fond of acquiring free apps are in the forefront of CommonOptimization infection.

The second effective way of deploying CommonOptimization app is via misleading ad campaign. Pop-up ads may appear on the browser to confuse webs users into downloading a bogus software update that will eventually install the adware onto the Mac computer. The pop-up was cleverly designed to appear as valid system warning that claims to have discovered obsolete version of Adobe Flash, Google Chrome, or Media Player.

CommonOptimization App

Once CommonOptimization is active on the browser, Mac user may experience significant amount of ad display. In addition, browser could suffer from persistent redirects that land the pages to questionable websites. The only way to stop these annoyances is to eliminate the threat from the computer. For this reason, we put up simple guide along with virus and malware scanners to help victims in the removal of CommonOptimization adware.

Procedures to Remove CommonOptimization 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 System 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 CommonOptimization. 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 CommonOptimization.

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 CommonOptimization 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 CommonOptimization or any unwanted program.

Delete Unwnated App

4. Drag CommonOptimization 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 CommonOptimization

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 CommonOptimization, 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 CommonOptimization

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.CommonOptimization
  • 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:

- AdjustableSkill, OptimalSync

If you cannot find the specified file, please look for any unfamiliar or suspicious entries. It may be the one causing CommonOptimization 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.

- AdjustableSkill, OptimalSync

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 Locked Files

3. Click on Force Quit button.

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

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 - Scan

5. After the scan, Malwarebytes Anti-malware for Mac will display a list of identified threats, CommonOptimization 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 CommonOptimization 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 CommonOptimization 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 CommonOptimization. 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 CommonOptimization 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 CommonOptimization. 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 CommonOptimization 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 CommonOptimization.

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