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Our iMac has a virus introduced with a worm.

283 Views 13 Replies Latest reply: Sep 9, 2012 4:53 PM by killhippie RSS
LesFinlow Calculating status...
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Sep 9, 2012 10:23 AM

What we think is a virus seems to be processing but then can't do anything.  There are also 2 shared devices in Finder that we don't recognize.

iMac, iOS 5.1.1
  • seventy one Level 6 Level 6 (8,455 points)
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    Sep 9, 2012 10:29 AM (in response to LesFinlow)

    Not enough information.   Can you be more specific?

  • stevejobsfan0123 Level 7 Level 7 (30,480 points)
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    Sep 9, 2012 10:30 AM (in response to LesFinlow)

    You don't have a virus. No viruses presently affect Mac OS X.

  • thomas_r. Level 7 Level 7 (26,935 points)
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    Sep 9, 2012 11:53 AM (in response to LesFinlow)

    Why do you believe you have a virus? Mac malware is extremely rare at this time, so whatever behavior you're seeing, it's almost certainly not caused by any malware. See my Mac Malware Guide for more about that.


    As for the shared devices in the sidebar of Finder windows, those are simply other devices on your local network that are announcing their presence so that you can easily locate them and use whatever services they offer. These may be other computers, printers, scanners, etc. If your wireless network is not locked down with a password, these could also be interlopers: neighbors who are using your wireless network either accidentally or to get free network service. If this is the case, I'd advise that you put WPA2 encryption on your wireless network ASAP. (Note that if you don't tighten the network's security, those neighbors could also, with some free software, monitor each and every packet of network data going to and from any computer on your network.)

  • thomas_r. Level 7 Level 7 (26,935 points)
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    Sep 9, 2012 12:34 PM (in response to LesFinlow)

    I got some emails with links that were bogus.  I opened one because I was expecting information from the person but it took me to an advertising site, so that's why I began to suspect virus/worm.


    If your Mac is up-to-date and has Java disabled, there's nothing whatsoever that can install on your machine simply by visiting a website. Even if you have an unsafe version of Java installed, the chances that you would stumble across just the right site to get infected are very low, especially now that Flashback has faded to just a memory.


    Symptoms: system hangs for long periods when switching between apps (spinning catherine wheel); tried multiple reboots but that didn't resolve the problem and OS takes for ever to restart;


    Something is definitely wrong there, but it's not malware. I'd try some of the things in my Mac Performance Guide.


    there are two shared resources that have shown up in Finder - not idisk or time machine - that I haven't seen before, don't recognize, and can't eject;


    As I mentioned, those are just other devices on your network. Note that they are not devices that are connecting to your computer, they are devices telling your computer it could connect to them.


    I was thinking of running Applejack to see if that helps?


    If you have Lion or Mountain Lion (Mac OS X 10.7 or 10.8), you should not use AppleJack. There's no reason to use it. Once upon a time, it was good for troubleshooting a Mac when parted from the install disks, but all Macs with Lion or later have a built-in recovery partition that can and should be used for disk repairs and the like. Hold down command-R at startup and then repair the hard drive with Disk Utility.


    If you are using an older system, you would be better off restarting from your Mac OS X install disc and repairing the hard drive from there using Disk Utility. Use AppleJack only in emergency situations when you don't have your disk and need to try desperate measures to get your machine back up and running.


    As to whether that will help, it probably won't, but wouldn't be a bad idea to try.

  • thomas_r. Level 7 Level 7 (26,935 points)
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    Sep 9, 2012 2:50 PM (in response to LesFinlow)

    I haven't tried to share any Windows resources with the Mac.


    I'm the only Mac user in our household at the moment (much to my kids' chagrin), and none of the Windows machines on our network have been set up to share anything. Still, they all show up in the Shared section of the sidebar on my Mac. That's normal.

  • killhippie Level 3 Level 3 (580 points)
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    Sep 9, 2012 4:38 PM (in response to LesFinlow)

    If you are getting a S.M.A.R.T and you cant repaid your drive you should back up and take it to a Apple store as soon as you can as the drive is failing. Reformating won't help.

  • killhippie Level 3 Level 3 (580 points)
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    Sep 9, 2012 4:53 PM (in response to killhippie)

    Edit :S.M.A.R.T error


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