How to remove SystemNotes adware from the operating system

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

How to remove SystemNotes from Mac computers

What is SystemNotes?

SystemNotes is software categorized as adware. As with most applications within this category, it is promoted as a tool for improving the browsing experience by providing fast searchers, accurate search results, etc. In fact, this rogue app diminishes the browsing experience by running intrusive advertisement campaigns. Due to the dubious proliferation methods used to promote SystemNotes (most users download/install it inadvertently), it is also classified as a Potentially Unwanted Application (PUA). Furthermore, most PUAs (including adware) monitor users' browsing habits and gather information derived from it.

SystemNotes adware

SystemNotes adware delivers a wide variety of annoying and harmful ads such as pop-ups, coupons, banners, surveys and so on. These seriously affect browsing, since they diminish browsing speed and limit website visibility (i.e., by overlaying page content), however, they are more than just a nuisance. These ads are also a threat to device health and user safety. Once an intrusive ad is clicked, it can redirect to sale-based, untrusted, rogue, compromised, deceptive/scam and malicious web pages. Furthermore, these ads can be triggered (by clicking them) to execute scripts designed to stealthily download/install rogue software (e.g. PUAs). These unwanted applications often have data tracking capabilities. They can monitor browsing activity (URLs visited, pages viewed, search queries typed, etc.) and collect users' personal information (IP addresses, geolocations and other details). It is highly likely that this sensitive data will then be shared with third parties (potentially, cyber criminals) intent on misusing it for profit. In summary, the presence of PUAs on systems can cause various infiltration and infections, lead to serious privacy issues, financial loss and even identity theft. Therefore, to ensure device integrity and user safety, you are advised to remove all suspect applications and/or browser extensions/plug-ins immediately upon detection.

Threat Summary:
Name Ads by SystemNotes
Threat Type Adware, Mac malware, Mac virus.
Detection Names Avast (MacOS:Adload-AB [Trj]), BitDefender (Gen:Variant.Adware.MAC.Adload.5), ESET-NOD32 (A Variant Of OSX/Adware.Didnarbois.A), Kaspersky (Not-a-virus:HEUR:AdWare.OSX.Adload.g), Full List (VirusTotal)
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.

BenefitSitesExpertModuleSearch and ActionHow are some examples of adware-type apps. They often appear legitimate and offer "useful" functions. The range of the features promised is broad, however, they are usually nonoperational. In fact, this applies to most PUAs whose only purpose is to generate revenue for the developers. Rather than delivering any real value, PUAs deliver intrusive ad campaigns, force-open untrusted and malicious sites, modify browsers and restrict/deny access to settings, and track/collect private data.

How did SystemNotes install on my computer?

PUAs can be downloaded/installed together with other products. "Bundling" is the term used to define this deceptive marketing tactic of pre-packing normal software with unwanted or malicious additions. When downloading/installing, ignoring terms, using pre-set options, skipping steps and sections increases the risk of potential infiltration and infections via bundled content. Some PUAs have "official" promotional web pages from which they can be downloaded. These web pages are commonly promoted by deceptive/scam sites. Intrusive ads also proliferate these apps. Once clicked, they can execute scripts to download/install PUAs without users' permission.

How to avoid installation of potentially unwanted applications

You are advised to research all products to verify their legitimacy, prior to download/installation or purchase. Perform all downloads from official and verified sources. Untrustworthy download channels such as free file-hosting websites, Peer-to-Peer sharing networks (BitTorrent, Gnutella, eMule, etc.) and other third party downloaders can offer deceptive or bundled content and should not be used. When downloading/installing, read the terms, explore all possible options, use the "Custom/Advanced" settings and opt-out of supplementary apps, tools, functions and so on. Intrusive ads typically seem legitimate and innocuous, however, they often generate redirects to dubious sites (e.g. gambling, adult-dating, pornography and others). If you encounter these advertisements/redirects, inspect the system and remove all suspicious applications and browser extensions/plug-ins without delay. If your computer is already infected with SystemNotes, we recommend running a scan with Combo Cleaner Antivirus for macOS to automatically eliminate this adware.

Pop-up window displayed once SystemNotes installation is over:

pop-up displayed once SystemNotes installation is done

Screenshot of SystemNotes adware installation folder:

SystemNotes adware installation 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 SystemNotes adware using Combo Cleaner:

SystemNotes adware removal:

Remove SystemNotes-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 systemnotes 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 SystemNotes removal from Internet browsers:

safari browser iconRemove malicious extensions from Safari:

Remove ads by systemnotes 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 systemnotes 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 systemnotes 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
Ads by SystemNotes 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 SystemNotes on your mobile device.
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