How to remove the OptimalUnit adware?

Also Known As: Ads by OptimalUnit
Type: Mac Virus
Distribution: Low
Damage level: Medium

How to remove OptimalUnit from Mac?

What is OptimalUnit?

OptimalUnit functions not only as adware but also as a browser hijacker. More precisely, it not only generates various advertisements but also makes certain changes in browser settings to promote the address of some fake search engine. Also, it is likely that it constantly collects details related to user's browsing activities and/or other information. Most of the times users install (and even download) adware, browser hijackers unintentionally. Therefore, apps of this type are called potentially unwanted applications (PUAs).

OptimalUnit adware

Like most adware-type apps, OptimalUnit generates coupons, banners, surveys, pop-up ads, and/or ads other types. It is common for ads that are displayed by adware to be designed to promote dubious pages. In some cases even to execute certain scripts and download and/or install some PUA. Also, this app promotes a fake search engines. Typically, apps of this type do that by changing settings such as the address of a default search engine, homepage and/or new to an address of a certain fake search engine.

Furthermore, it is possible that OptimalUnit can read browsing data like addresses of visited websites, entered search queries, geolocations, IP addresses, or even some sensitive information. In such case gathered information could be misused for various malicious purposes, for example - it could be monetized by selling it to third parties, potentially some cyber criminals. This could cause users issues related to web browsing safety, online privacy, some of them may even become victims of identity theft.

Threat Summary:
Name Ads by OptimalUnit
Threat Type Adware, Mac malware, Mac virus
Additional Information This application belongs to Adload malware family.
Symptoms Your Mac becomes slower than normal, you see unwanted pop-up ads, you are redirected to dubious websites.
Distribution methods Deceptive pop-up ads, free software installers (bundling), fake Flash Player installers, torrent file downloads.
Damage Internet browser tracking (potential privacy issues), display of unwanted ads, redirects to dubious websites, loss of private information.
Malware Removal (Mac)

To eliminate possible malware infections, scan your Mac with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
▼ Download Combo Cleaner for Mac
To use full-featured product, you have to purchase a license for Combo Cleaner. Limited three days free trial available.

It is worthwhile to mention that when apps like OptimalUnit change browser settings, those changes cannot be undone unless users uninstall those apps. This (and other things that are mentioned in above paragraphs) is the reason why users should not have adware-type apps and/or browser hijackers installed on a browser (or the operating system). More adware examples are PrimaryProcesser, TypicalInput and LeadingLibrary.

How did OptimalUnit install on my computer?

It is common that users download and install potentially unwanted apps together with other programs. To be more precise, when PUAs are offered in download and/or installation setups of those programs and users do not decline unwanted offers. This distribution method for PUAs is called "bundling". Typically, offers to download PUAs can be declined in "Custom", "Advanced" and other similar settings, or by unticking certain checkboxes. Sometimes users cause unwanted downloads and/or installations by clicking advertisements that are designed to run certain scripts. It is common for such ads to appear on questionable pages.

How to avoid installation of potentially unwanted applications?

To avoid unwanted downloads and installations it is advised to download programs from official, trustworthy websites (and via direct download links, and not to use third party downloaders (or installers), torrent clients, eMule (or other Peer-to-Peer networks) unofficial pages, etc. Also, it is recommended not to finish downloads and installations without checking setups for offers to download or install unwanted apps. Advertisements on shady pages should not be clicked as well, those ads could open other pages of this kind or cause unwanted downloads, installations. Unwanted plug-ins, add-ons or extensions that are already installed on a browser should be removed. The same should be done with software of this kind that is installed on a computer (operating system). If your computer is already infected with OptimalUnit, we recommend running a scan with Combo Cleaner Antivirus for macOS to automatically eliminate this adware.

Pop-up window displayed once OptimalUnit installation is over:

optimalunit adware pop-up displayed once installation is finished

OptimalUnit's Contents folder:

optimalunit adware contents folder

Instant automatic Mac malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of Mac malware. Download it by clicking the button below:
▼ DOWNLOAD Combo Cleaner for Mac By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. Limited three days free trial available.

Quick menu:

Video showing how to remove OptimalUnit adware using Combo Cleaner:

OptimalUnit adware removal:

Remove OptimalUnit-related potentially unwanted applications from your "Applications" folder:

mac browser hijacker removal from applications folder

Click the Finder icon. In the Finder window, select "Applications". In the applications folder, look for "MPlayerX", "NicePlayer", or other suspicious applications and drag them to the Trash. After removing the potentially unwanted application(s) that cause online ads, scan your Mac for any remaining unwanted components.

Remove ads by optimalunit related files and folders:

Finder go to folder command

Click the Finder icon, from the menu bar. Choose Go, and click Go to Folder...

step1Check for adware-generated files in the /Library/LaunchAgents folder:

removing adware from launch agents folder step 1

In the Go to Folder... bar, type: /Library/LaunchAgents

removing adware from launch agents folder step 2
In the “LaunchAgents” folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, “kuklorest.update.plist”, etc. Adware commonly installs several files with the same string.

step2Check for adware generated files in the /Library/Application Support folder:

removing adware from application support folder step 1

In the Go to Folder... bar, type: /Library/Application Support

removing adware from application support folder step 2
In the “Application Support” folder, look for any recently-added suspicious folders. For example, “MplayerX” or “NicePlayer”, and move these folders to the Trash.

step3Check for adware-generated files in the ~/Library/LaunchAgents folder:

removing adware from ~launch agents folder step 1


In the Go to Folder bar, type: ~/Library/LaunchAgents

removing adware from ~launch agents folder step 2

In the “LaunchAgents” folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, “kuklorest.update.plist”, etc. Adware commonly installs several files with the same string.

step4Check for adware-generated files in the /Library/LaunchDaemons folder:

removing adware from launch daemons folder step 1
In the Go to Folder... bar, type: /Library/LaunchDaemons

removing adware from launch daemons folder step 2
In the “LaunchDaemons” folder, look for recently-added suspicious files. For example “com.aoudad.net-preferences.plist”, “com.myppes.net-preferences.plist”, "com.kuklorest.net-preferences.plist”, “com.avickUpd.plist”, etc., and move them to the Trash.

step 5 Scan your Mac with Combo Cleaner:

If you have followed all the steps in the correct order you Mac should be clean of infections. To be sure your system is not infected run a scan with Combo Cleaner Antivirus. Download it HERE. After downloading the file double click combocleaner.dmg installer, in the opened window drag and drop Combo Cleaner icon on top of the Applications icon. Now open your launchpad and click on the Combo Cleaner icon. Wait until Combo Cleaner updates it's virus definition database and click "Start Combo Scan" button.

scan-with-combo-cleaner-1

Combo Cleaner will scan your Mac for malware infections. If the antivirus scan displays "no threats found" - this means that you can continue with the removal guide, otherwise it's recommended to remove any found infections before continuing.

scan-with-combo-cleaner-2

After removing files and folders generated by the adware, continue to remove rogue extensions from your Internet browsers.

Ads by OptimalUnit removal from Internet browsers:

safari browser iconRemove malicious extensions from Safari:

Remove ads by optimalunit related Safari extensions:

safari browser preferences

Open Safari browser, from the menu bar, select "Safari" and click "Preferences...".

safari extensions window

In the preferences window, select "Extensions" and look for any recently-installed suspicious extensions. When located, click the "Uninstall" button next to it/them. Note that you can safely uninstall all extensions from your Safari browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Safari.

firefox browser iconRemove malicious plug-ins from Mozilla Firefox:

Remove ads by optimalunit related Mozilla Firefox add-ons:

accessing mozilla firefox add-ons

Open your Mozilla Firefox browser. At the top right corner of the screen, click the "Open Menu" (three horizontal lines) button. From the opened menu, choose "Add-ons".

removing malicious add-ons from mozilla firefox

Choose the "Extensions" tab and look for any recently-installed suspicious add-ons. When located, click the "Remove" button next to it/them. Note that you can safely uninstall all extensions from your Mozilla Firefox browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Mozilla Firefox.

chrome-browser-iconRemove malicious extensions from Google Chrome:

Remove ads by optimalunit related Google Chrome add-ons:

removing malicious google chrome extensions step 1

Open Google Chrome and click the "Chrome menu" (three horizontal lines) button located in the top-right corner of the browser window. From the drop-down menu, choose "More Tools" and select "Extensions".

removing malicious Google Chrome extensions step 2

In the "Extensions" window, look for any recently-installed suspicious add-ons. When located, click the "Trash" button next to it/them. Note that you can safely uninstall all extensions from your Google Chrome browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Google Chrome.

Click to post a comment

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

Our malware removal guides are free. However, if you want to support us you can send us a donation.

Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Ads by OptimalUnit QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Ads by OptimalUnit on your mobile device.
We Recommend:

Get rid of Mac malware infections today:

▼ REMOVE IT NOW
Download Combo Cleaner for Mac

Platform: macOS

Editors' Rating for Combo Cleaner:
Editors ratingOutstanding!

[Back to Top]

To use full-featured product, you have to purchase a license for Combo Cleaner. Limited three days free trial available.