An increasing number of users are experiencing issues with Safari. Specifically, a pop-up alert window appears saying that their Mac may have been hijacked or that there is a “suspicious activity” or that their Mac is infected with a virus.

Jan 12, 2013 I've had a screen pop up saying potential threat details and to clean computer but web page shows //kqmhap.usr.sh Hi, I've had an alert flash up saying its from Microsoft security essentials saying 'potential threats might compromise your privacy or damage your computer. Learn more about all the topics, resources, and contact options you need to download, update and manage your Safari settings. Global Nav Open Menu Global Nav Close Menu Apple.

You may see a popup message something like this:

Critical Security Warning! Your Mac is infected with a malicious virus attack. Please contact tech support at +1-888-307-2735 and provide error code WBACK7917 to scan and resolve any potential threats to your personal and financial information, which was being tracked by suspicious connection. Consequently we are performing additional security checks to verify the source of the attack and have halted all your system resources in order to prevent any additional damage to your system and information.”

This is a scam message. Safari (Explorer or Chrome) will look unresponsive and locked and you will not be able to close the popup.

This is just a JavaScript pop-up. Just keep calm. Do not worry, this is not a virus. And further your Mac has not been infected with any malware. Tis message is designed to scare and deceive Mac users into thinking there is something wrong.

Do not call the number on the message. And do not click the “OK” button. If you call the number, whoever answer the phone will ask you to access your Mac remotely. Or they may ask you to pay between $100 and $500. Do not do this. They are trying to steal your money.

Here is how to fix security alert messages:

Follow the steps below:

• Force quit Safari by pressing Command-Option-Esc.
• Force Quit window will appear
• Select Safari
• Then click Force Quit
• Now you need to restart Safari. But if you start Safari normally, the popup may appear. Now while pressing the Shift key, launch Safari. This is important step. This will restart the browser without reloading previously open sessions.

If you are still experiencing this problem:

Red Screen Yu-gi-oh

• Force quit Safari
• Relaunch Safari while holding down the Shift key
• Turn Wi-Fi off. Simply click the wireless icon in the upper left corner then choose Turn Wi-Fi Off
• Visit a web site e.g. apple.com
• Now connect to the Internet by turning Wi-Fi on.

Red Screen Call Microsoft

Note: You may also want to clear your browser history. Choose History > Clear History.

Mac Safari Red Screen Call Microsoft One

See also: Mac Stuck On “Setting up your Mac”, Fix