How to Fix the System Scan Is Recommended Pop-up Malware on Mac
Question details
The user is encountering recurring and intrusive pop-up messages on their Mac claiming that a system scan is recommended.

- Product
- macOS
- Device & OS
- Mac
- Scenario
- Browsing the web or operating the Mac shortly after downloading third-party software, such as an unofficial PDF reader.
- Observed behavior
- A deceptive system scan warning repeatedly pops up on the screen, attempting to trick the user into installing unwanted software, adware, or malware.
Do not click any buttons on the pop-up message or download the software it recommends, as this is a known phishing tactic designed to infect your Mac with malware.
Identify and Remove Malicious Applications
Locate and delete the unfamiliar or fake applications that are generating these deceptive security alerts.
If you recently downloaded software like Adobe Acrobat from an unofficial source, it may have secretly installed adware or unwanted programs like MacKeeper on your system.
Launch Finder on your Mac, click on 'Applications' in the sidebar, and set the view mode to list. Sort the applications by 'Date Added' to easily spot recent installations.
Look for any unfamiliar programs, fake software installers, or apps you did not intentionally download.
Right-click the suspicious application and select 'Move to Trash'. Afterwards, right-click the Trash icon in your Dock and select 'Empty Trash' to permanently remove the software.

Disable Fake Browser Notifications
Stop websites from sending malicious pop-up alerts through your browser's notification system.
Reinstall Official Software
Replace compromised or fake PDF readers with genuine versions downloaded directly from official sources.
Edit PDFs Safely with WPS Office for Mac
Protect your Mac from fake installers and adware by switching to WPS Office. It provides a secure, lightweight, and official alternative to other PDF readers, offering comprehensive tools to read, edit, and convert documents safely.
- 1. Visit the official website: Go to the official WPS website to ensure a safe, malware-free download.
- 2. Download the Mac installer: Click the free download button specifically designed for macOS.
- 3. Install securely: Open the downloaded file and follow the standard macOS installation steps to deploy your safe office suite.

Frequently Asked Questions
Is the 'System Scan Is Recommended' pop-up a real Apple alert?
No. Apple does not send unsolicited pop-up messages in your browser or desktop recommending system scans. This is a common scam tactic designed to trick you into downloading adware or malware.
Why did this pop-up appear after I installed a PDF reader?
You likely downloaded a fake or bundled version of the PDF reader from an unofficial third-party website. These unofficial installers often include hidden malicious software that generates fake alerts.
How can I tell which application is causing these fake alerts?
Check your browser's site notification settings for unfamiliar websites that have been granted permission. Additionally, review your Mac's Applications folder sorted by 'Date Added' to spot any suspicious programs you do not recognize.




