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How do you know if your mac has a virus

I think my mac book has a virus. Iv been getting these mac keeper pop ups and my mac has been acting slow. Also it made me shut my computer off today by holding the power button down then restart. What should I do. Is there an antivirus to put on macs?

Did you install MacKeeper?  If not, it's just obnoxious advertising from an unethical company, whose pop-ups can get past some pop-up blockers.

As to the malware thing, see my Mac Malware Guide.  You should also read About the Flashback malware for information about the current serious threat.  (Note that my pages contain links to other pages that promote my services, and this should not be taken as an endorsement of my services by Apple.)

However, nothing you have said would seem to indicate you have malware.  You may just have a corrupt hard drive...  try repairing with Disk Utility.  (What version of Mac OS X are you using, so that we can give you more specific directions on how that is done?)

Uninstall MacKeeper

https://discussions.apple.com/docs/DOC-3036

check for flashback

https://www.securelist.com/en/blog/208193454/Flashfake_Removal_Tool_and_online_c hecking_site

Harden your Mac

https://discussions.apple.com/docs/DOC-3291

more

https://discussions.apple.com/community/notebooks/macbook_pro?view=documents

I thought Macs dont receive virus? -_- That is weird...

There are currently no know viruses for the mac.  Flashback is a trojan.

Flashback is a trojan.

Technically not entirely true.  There are two defining characteristics of a virus: self-replication and self-installation.  There is one defining characteristic of a trojan: tricking the user into installing.  Current variants of Flashback are absolutely not a trojan by that definition.  But they only fit one characteristic of a virus, not both.  It's more similar to a virus than a trojan.

Thanks so much for the help and i hope all my problems go away on my mac!

It is possible for a Mac to get a virus, but because there are tens of thousands of viruses for Windows compared to just about none on the Mac, when you have a problem of any kind, the possibility of it being a virus is remote enough that you should not immediately assume that it might be a virus. Thinking that way will only distract you from doing the troubleshooting in far more likely areas, like stupid software like MacKeeper or a hardware problem.

Mackeeper sort of self-installed on my computer and is starting to affect my safari web browser by literally creating popups every time I start a new tab. Is there any way to get rid of it because it also made itself the default search engine.

最後更新：2017-10-16 09:45:13

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