Author Topic: Why avast Mac Security is unable to scan some files?  (Read 10737 times)

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Offline candylovergirl

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Why avast Mac Security is unable to scan some files?
« on: July 31, 2018, 02:13:52 AM »
Hello,

I don't understand why avast for Mac is unable to scan some files.... What if those files unable to scan for avast contains malware or something?  :o






Offline ondrej.kolacek

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Re: Why avast Mac Security is unable to scan some files?
« Reply #1 on: July 31, 2018, 10:45:28 AM »
Hello,
if you right click on the results page and select Unscannable (or something similar), you can see the reason why the files were unscannable. It can be malformed archives, files that can not be opened (system integrity protection prevents some files from being opened), etc.
Kind regards,
Ondrej Kolacek

Offline .: Mac :.

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Re: Why avast Mac Security is unable to scan some files?
« Reply #2 on: July 31, 2018, 11:36:32 AM »
Hello,

I don't understand why avast for Mac is unable to scan some files.... What if those files unable to scan for avast contains malware or something?  :o

Many times these are files you do not have permission to access, or are corrupted in some way. If they did contain malware, its not likely to be a threat (but also not likely to contain it anyway in such a case)
"People who are really serious about software should make their own hardware." - Alan Kay

Offline candylovergirl

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Re: Why avast Mac Security is unable to scan some files?
« Reply #3 on: August 01, 2018, 01:18:23 PM »
Hello,
if you right click on the results page and select Unscannable (or something similar), you can see the reason why the files were unscannable. It can be malformed archives, files that can not be opened (system integrity protection prevents some files from being opened), etc.
Kind regards,
Ondrej Kolacek

Oh thank you! I didn't know that  :)


Many times these are files you do not have permission to access, or are corrupted in some way. If they did contain malware, its not likely to be a threat (but also not likely to contain it anyway in such a case)

Then I still don't understand if the .DMG is corrupted
Why I can install the app without any issue if a .DMG is corrupted?





Offline ondrej.kolacek

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Re: Why avast Mac Security is unable to scan some files?
« Reply #4 on: August 01, 2018, 04:18:18 PM »
Then I still don't understand if the .DMG is corrupted
Why I can install the app without any issue if a .DMG is corrupted?

Hello,

.dmg is a container that can use multiple internal data formats; it is possible that our unpack algorithm does not know the specific one you are using. If you got a time, could you upload the .dmg file somewhere (eg. google drive, dropbox) and send me link to ondrej.kolacek at avast.com? I will forward it to our virus lab guys.

Kind regards,
Ondrej Kolacek