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My iMac desktop is running very slow, like if it has a virus and pop up ads for tech support keep interrupting me. What may be the problem?

My iMac desktop is running very slow, like if it has a virus, and ads for tech support keep popping up. What may be the problem?

iMac, iOS 8

Posted on Sep 17, 2014 5:34 PM

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3 replies

Sep 17, 2014 5:36 PM in response to Misterioso17

Helpful Links Regarding Malware Problems


If you are having an immediate problem with ads popping up see The Safe Mac » Adware Removal Guide and AdwareMedic.


Open Safari, select Preferences from the Safari menu. Click on Extensions icon in the toolbar. Disable all Extensions. If this stops your problem, then re-enable them one by one until the problem returns. Now remove that extension as it is causing the problem.


An excellent link to read is Tom Reed's Mac Malware Guide.

Also, visit The XLab FAQs and read Detecting and avoiding malware and spyware.

See these Apple articles:


Mac OS X Snow Leopard and malware detection

OS X Lion- Protect your Mac from malware

OS X Mountain Lion- Protect your Mac from malware

OS X Mavericks- Protect your Mac from malware

About file quarantine in OS X


If you require anti-virus protection Thomas Reed recommends using ClamXAV. (Thank you to Thomas Reed for this recommendation.)


From user Joe Bailey comes this equally useful advice:


The facts are:


1. There is no anti-malware software that can detect 100% of the malware out there.

2. There is no anti-malware that can detect everything targeting the Mac.

3. The very best way to prevent the most attacks is for you as the user to be aware that

the most successful malware attacks rely on very sophisticated social engineering

techniques preying on human avarice, ****, and fear.

4. Internet popups saying the FBI, NSA, Microsoft, your ISP has detected malware on

your computer is intended to entice you to install their malware thinking it is a

protection against malware.

5. Some of the anti-malware products on the market are worse than the malware

from which they purport to protect you.

6. Be cautious where you go on the internet.

7. Only download anything from sites you know are safe.

8. Avoid links you receive in email, always be suspicious even if you get something

you think is from a friend, but you were not expecting.

9. If there is any question in your mind, then assume it is malware.

My iMac desktop is running very slow, like if it has a virus and pop up ads for tech support keep interrupting me. What may be the problem?

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