How to uninstall Mac Optimizer Pro potentially unwanted application?

Also Known As: Mac Optimizer Pro potentially unwanted application
Type: Mac Virus
Distribution: Low
Damage level: Medium

How to remove Mac Optimizer Pro from Mac?

What is Mac Optimizer Pro?

Mac Optimizer Pro is a piece of software, promoted as a tool for cleaning and optimizing Mac Operating System. However, due to the questionable techniques used to distribute this app, it is classified as a PUA (Potentially Unwanted Application). Software within this classification may be nonoperational and/or have unmentioned abilities.

Mac Optimizer Pro unwanted application

Dubious distribution methods may be used for legitimate products, however they are more commonly employed to proliferate untrustworthy software. Some PUAs (e.g. fake anti-virus tools) can require activation (purchase) to perform the advertised abilities, however even following activation - they remain nonoperational. Additionally, there are PUAs that have heinous abilities, which are unmentioned (or hidden) in the promotional material and/or installation setups. Unwanted applications can be able to cause redirects to (i.e. force-open) sale-oriented/promotional, rogue, compromised, deceptive/scam and malicious websites. Adware-type PUAs run intrusive advertisement campaigns (i.e. deliver pop-ups, banners, coupons ad other ads). The delivered adverts seriously diminish the browsing experience, as they limit the browsing speed and site visibility (by overlaying page content). Furthermore, upon being clicked, intrusive ads redirect to dangerous sites and some can even stealthily download/install software. Another type of PUA called browser hijackers - assign the addresses of fake search engines as browsers' homepage, default search engine and new tab/window URLs. Hence, with such a piece of software installed: every new browser tab/window opened and search query typed into the URL bar - redirect to the promoted address. Fake search engines are rarely able to provide search results, so they tend to redirect to Yahoo, Bing, Google and other legitimate ones. Browser hijackers can also restrict/deny access to the browsers' settings and/or undo any permitted changes made. What is more, most PUAs (regardless of type) can track data. They can monitor browsing activity (URLs visited, pages viewed, search queries typed, etc.) and collect personal information extracted from it (IP addresses, geolocations and other details). This vulnerable data is then shared with and/or sold to third parties (potentially, cyber criminals). To summarize, presence of unwanted software on devices can lead to system infections, financial losses, severe privacy issues and even identity theft. Therefore, it is strongly advised to eliminate all suspect applications and browser extensions/plug-ins immediately upon detection.

Threat Summary:
Name Mac Optimizer Pro potentially unwanted application
Threat Type PUP (potentially unwanted program), PUA (potentially unwanted application), Mac malware, Mac virus
Supposed Functionality System cleaning and optimization
Detection Names Avast (MacOS:MacOptimizer-A [PUP]), BitDefender (Gen:Variant.Application.MAC.Koiot.918), Sophos AV (Mac Optimizer Pro (PUA)), Tencent (Mac.Trojan.Application.Pfjg), Full List Of Detections (VirusTotal)
Symptoms A program that you do not recall installing suddenly appeared on your computer. A new application is performing computer scans and displays warning messages about 'found issues'. Asks for payment to eliminate the supposedly found errors.
Distribution Methods Deceptive pop-up ads, free software installers (bundling), fake Flash Player installers.
Damage Monetary loss (unnecessary purchase of fake software), unwanted warning pop-ups, slow computer performance.
Malware Removal (Mac)

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

MacMasterQuick Mac FixerTotal Mac FixerQuick Mac BoosteriMacCleaner - are some examples of other potentially unwanted applications similar to Mac Optimizer Pro. This software typically appears legitimate and useful. PUAs offer a wide variety of functionalities, however they are usually nonoperational. The sole purpose of unwanted apps is to generate revenue for the developers; hence, functionality and user safety are irrelevant. Instead of delivering on any promises, PUAs can cause redirects, run intrusive advert campaigns, hijack browsers, collect sensitive and personally identifiable information.

How did potentially unwanted applications install on my computer?

Some PUAs (e.g. Mac Optimizer Pro) have "official" promotional webpages, from which they can be downloaded. These applications can also be downloaded/installed together with other products. This deceptive marketing tactic of pre-packing regular software with unwanted or malicious additions - is called "bundling". Rushed download/installation processes (e.g. ignored terms, skipped steps and sections, used "Easy/Express" settings, etc.) - increase the risk of unintentionally allowing dubious and/or bundled content into the system. Intrusive advertisements proliferate PUAs as well. Once clicked on, the ads can execute scripts to download/install PUAs without user permission.

How to avoid installation of potentially unwanted applications?

It is highly recommended to research software products to verify their legitimacy, prior to download/installation and/or purchase. All downloads must be done from official and verified sources. Since untrustworthy download channels, e.g. unofficial and free file-hosting websites, Peer-to-Peer sharing networks and other third party downloaders. When downloading/installing, it is crucial to read terms, study all available options, use the "Custom/Advanced" settings and opt-out from supplementary apps, tools, features and other additions. It is just as important to exercise caution when browsing. Intrusive adverts typically appear legitimate and innocuous, however they redirect to unreliable and questionable sites (e.g. gambling, adult-dating, pornography, etc.). In case of encounters with ads and/or redirects of this kind, the system must be inspected and all suspicious applications and browser extensions/plug-ins detected - immediately removed from it. If your computer is already infected with PUAs, we recommend running a scan with Combo Cleaner Antivirus for macOS to automatically eliminate them.

Appearance of Mac Optimizer Pro application (GIF):

Appearance of Mac Optimizer Pro PUA (GIF)

Mac Optimizer Pro installation setup:

Installation setup of Mac Optimizer Pro PUA

Website promoting Mac Optimizer Pro application:

Website used to promote Mac Optimizer Pro PUA

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 adware and browser hijackers from a Mac computer:

Potentially unwanted applications removal:

Remove 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 mac optimizer pro potentially unwanted application 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.

Mac Optimizer Pro potentially unwanted application removal from Internet browsers:

safari browser iconRemove malicious extensions from Safari:

Remove mac optimizer pro potentially unwanted application 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 mac optimizer pro potentially unwanted application 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 mac optimizer pro potentially unwanted application 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.

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.

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Malware activity

Global malware activity level today:

Medium threat activity

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

QR Code
Mac Optimizer Pro potentially unwanted application QR code
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