QuestDevice Adware Removal (Mac)

QuestDevice is a potentially unwanted application (PUA) that offers amazing features to entice Mac computer users. It states that this application will help users improve their online browsing and searching experience. To provide efficient search outcomes via their fast servers is the marketing slogan of the people behind the QuestDevice app.

How does QuestDevice infect the Mac computer?

QuestDevice has been just like other ad-supported programs that use a number of sneaky methods to be installed on the computer. It normally employs the bundling scheme as the main point of entry. When the installation process is complete, it may change your default browser settings and collect sensitive information relating to your Internet surfing routine.

Another noticeable spread tactic of QuestDevice is the use of aggressive online advertisements from suspicious sites. It is often disguised as an Adobe or Google Chrome update to entice Mac users to install the software. Instead of the supposed software update, this misleading ad will install QuestDevice on the computer. See a sample screenshot of the fake software update below.

Screenshot of QuestDevice

Ads by QuestDevice

The primary goal of QuestDevice adware is to gain profit through its own advertising system. Thus, it delivers savings, deals, and other commercial items online. You may notice that some ads are related to your preferences. However, it may also render it intrusive and disrupt advertisements.

Another concern associated with QuestDevice adware is the invasion of online privacy. As mentioned, one of its functions is to gather data based on your web surfing habits. The prime purpose of this task is to enhance its marketing campaign. However, in some cases, online fraudsters mishandle such information and use it for other malicious intents, like stealing personal identities.

Thus, as soon as you see ads by QuestDevice, it clearly denotes that an adware program is running on your computer. The only way to remove all unwanted advertisements and bring the browser back to its previous state is to get rid of QuestDevice adware.

Avoiding the adware infection is important

Download software exclusively from reliable sources, such as the Mac App Store or official developer websites, to avoid QuestDevice adware infection on your Mac. Aim to prevent unnecessary offers or checkboxes for unidentified applications by carefully reading through program installation procedures. Update your Mac’s software and hardware to close any security gaps that QuestDevice adware could exploit. To get alerts about potentially dangerous downloads, activate the built-in Gatekeeper function by navigating to “System Preferences” > “Security & Privacy” > “General”. For extra security against QuestDevice and other dangers, it’s also a good idea to install a reputable antivirus program and do routine scans.

Be wary while seeing pop-ups and advertisements online, especially if they seem to be offering freebies. Use the browser’s built-in buttons to clear pop-up windows, and refrain from clicking on dubious advertisements. Keep an eye on and manage your browser extensions on a regular basis. Uninstall any that you no longer require or that look suspicious because adware occasionally poses as one.

Procedures to Remove QuestDevice 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 QuestDevice. You may need to purchase the full version if you want 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 your antivirus downloads its latest virus definition updates.

6. Next, click on "Start Combo Scan" to start removing QuestDevice.

Combo Cleaner Scanner

7. 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 manually removing malicious objects associated with the threat.

Step 1 : Delete QuestDevice 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 QuestDevice or any unwanted program and suspicious item. It may also disguise itself as a different file with random names.

Delete Unwanted App

4. Drag the suspicious file to the 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 QuestDevice

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 QuestDevice, 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 QuestDevice

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.QuestDevice.plist
  • unknown.service.plist
  • unknown.system.plist
  • unknown.download.plist
  • unknown.update.plist

The term unknown is just a representation of the actual malware name. Attackers may use the following file names:

- QuestDevice, (random characters).plist

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

- QuestDevice

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 QuestDevice 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 the most recent version if one is available. This is necessary for finding recent malware threats, including QuestDevice.

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

Step 5 : Remove QuestDevice from Homepage and Search

Safari

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

Google Chrome

- Open the Google Chrome browser.
- Input the following on the address bar and press Enter on the keyboard : chrome://settings/
- Look for 'On Startup' area on the sidebar.
- Select 'Open a specific page or set of pages'.
- Choose the unwanted homepage, and click on Ellipses (three dots) and select Edit.
- Enter the desired web address as your homepage, replacing the QuestDevice setting. Click Save.
- To set the default search engine, go to the Search Engine area from the sidebar link.
- Click on 'Manage search engines...' button.
- Select the questionable Search Engine and click on Ellipses (three dots). ClickDelete. to remove it from the list.
- Go back to the Search Engine area and choose a valid entry (i.e., Google) 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
- Click Home on the sidebar area.
- Under "New Windows and Tabs", you may choose Firefox Home (Default) or Custom URLs. - Input the desired URL to replace QuestDevice settings if you chose Custom URLs.
- To configure default search engine, select Search on the sidebar to display the settings.
- Under the Default Search Engine list, please select one (i.e., Google).
- On the same page, you have the option to Remove unwanted search engines.

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

Some users complain that there is no way to change browser settings because they are grayed out by QuestDevice. In such a situation, it is important to check if there is an 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 QuestDevice or any relevant profile from the left pane. See the image below.

Remove Mac Profile

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

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

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