How to remove PrimaryFunction (Mac)

By Chona Esjay | Posted on April 8, 2020 | Updated on June 27, 2020

PrimaryFunction is a kind of adware application specifically targeting Mac computers. Developers created PrimaryFunction to bombard browsers with intrusive advertisements and pop-up windows. Once a Mac user installed PrimaryFunction on the Mac computer, it could possibly lead to some changes on the browser functions and give way to additional malware intrusions.

Effects of PrimaryFunction Adware

PrimaryFunction can possibly diminish the browsing experience of the Mac user. This adware is determined to display consistent pop-up ads and redirects on browser application like Safari, Google Chrome, or Firefox. The intended browsing activity of the Mac user can be disturbed due to the constant appearances of ads and pop-ups. Adverts usually overlay the page contents reducing the website visibility of Mac users. Aside from ads, pop-ups also appear that usually recommend fake security software or updates. Clicking such pop-ups could result in automatic download and installation of malicious software on Mac computer. This adware may unload another malware or similar adware like DynamicWindow, MainReady, UltraLocator, and many more.

Moreover, PrimaryFunction can cause browser redirection into dubious websites. For example, every time Mac user performs an internet search, the browser will reroute into another web page. Typically, such redirects lead Mac user into untrustworthy sites such as online gambling sites, adult-related web pages, or scams and phishing sites. These kinds of websites are not advisable to visit since they present undesirable and questionable content. The only way to protect Mac computer and prevent further risks is to remove PrimaryFunction as soon as possible.

PrimaryFunction Infection Method

One method of developers in order to spread the adware is through software bundling by incorporating PrimaryFunction on certain applications especially freeware. The installation of particular free software can possibly bring PrimaryFunction on the process without the consent from Mac users. Besides, the installer will not mention that there is an extra application on the installation. This invasive behavior of PrimaryFunction or any other malicious applications is a reminder that Mac users should inspect every step on the installation process. In addition, Mac users should make a habit to check the application before downloading and installing. In this way, Mac computers can be protected from any malicious software intrusions that can cause serious damages and issues. In addition, installing anti-virus and anti-malware tool is also helpful in guarding the system against hazardous threats.

Procedures to Remove PrimaryFunction 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.

Step 1 : 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 PrimaryFunction. You may need to purchase full version if you require to maximize its premium features.

1. Download the tool from the following page:

Download Combo Cleaner Tool

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 it's latest virus definition updates and click on "Start Combo Scan" to start removing PrimaryFunction.

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 2 : Delete PrimaryFunction 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 PrimaryFunction or any unwanted program.

Delete Unwnated App

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

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

Step 3 : Remove Browser Extensions that belongs to PrimaryFunction

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 Plugins lists when it opens a new window.

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

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

Step 4 : Delete Malicious Files that have installed PrimaryFunction

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.PrimaryFunction
  • 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:

- ServiceLegacy, OnlyApplication

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

- ServiceLegacy, OnlyApplication

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 PrimaryFunction adware.

Step 5 : Double-check with MBAM Tool for Mac

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

Click here to download MBAM for Mac

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 PrimaryFunction.

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, PrimaryFunction is surely part of it. Be sure to select all items in the list. Then, click Remove button to clean the computer.

Step 6 : Remove PrimaryFunction 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 PrimaryFunction 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 PrimaryFunction. 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 PrimaryFunction 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 PrimaryFunction. 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 PrimaryFunction 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 PrimaryFunction.

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