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Question: Zip Archives won't unarchive...

Hi Folks,


I'm in dire straits here. A couple of months ago I decided to compress some of my backups to conserve space on my external drive. I'm running OSX 10.7 and arching the folders didn't seem to be an issue at all. The OSX version of the zip archiver didn't throw any warnings or messages when these archives were created.


When I went back to try and unarchive them using the same utility it wouldn't work. Now, it throws an error to the effect:


Unable to expand "Archive.zip" in "Folder".

(Error 1 - Operation not permitted)


I've tried a number of solutions including the archive into another directory, playing with the permissions, running the zip utility in both 32- and 64-bit modes. I've even moved some of the archives to different versions of OSX and Windows and nothing seems to be working.


Can anyone shed light on this issue?


Thanks


Stefan

MacBook Pro, Mac OS X (10.7.1), 15" MBP, 11" MBA, Mini Lion Server

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Mar 8, 2012 1:00 PM in response to Stefan Lehmann In response to Stefan Lehmann

That is really bad. I have attempted to recover data from corrupt zip files in the past with zero percent success rate. It appears once zip files get corrupted that chances of recovering anything is very remote.


Allan

Mar 8, 2012 1:00 PM

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Mar 8, 2012 1:08 PM in response to Stefan Lehmann In response to Stefan Lehmann

Tell me about it. What I can't figure out is why the Zip utility didn't check the archive and throw an error before closing down. Now I'm stuck with several gigabytes of bricked data and don't trust the utility to do anything anymore.

Mar 8, 2012 1:08 PM

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Sep 24, 2012 7:15 AM in response to ts232 In response to ts232

I found a fix, using one of two utilities (one free, one 3.99) from the App Store.


The Unarchiver:

http://itunes.apple.com/app/the-unarchiver/id425424353?mt=12&ls=1


Tha Archive Browser:

http://itunes.apple.com/us/app/the-archive-browser/id510232205?mt=12

Sep 24, 2012 7:15 AM

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Jul 19, 2014 8:40 PM in response to Stefan Lehmann In response to Stefan Lehmann

Hey, also I know it is while since your issue, but I've definitely run into this multiple times for all files. I seemed to also find the quickest shortcut to be:


Open the Terminal utility and after it opens type: unzip (and hit spacebar) , then just drag the file right into Terminal, press Enter and boom. file is unzipped! Hope this also helps for everyone as I have not had any major issues or if it wasn't a similar issue sorry!

Jul 19, 2014 8:40 PM

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Nov 25, 2014 6:31 PM in response to Siddharth0905 In response to Siddharth0905

Exactly Siddharth0905. It's great that I can use The Unarchiver, but when I send a link to a zip file to a client and they can't open it right away, they are not happy. Explaining to them that they need to download some other program because the default Apple one doesn't work is not an option. Is there any way to force a zip file to work universally?

Nov 25, 2014 6:31 PM

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Jan 29, 2015 7:42 AM in response to Stefan Lehmann In response to Stefan Lehmann

I ran into this yesterday when the Zip file was missing two bytes at the end (both 0x0). This was due to a poor Base64 Decode function. Either way, when the two bytes were restored, the file opened perfectly. I realize this is probably a 1%, but thought I would let everyone know not to rule out an issues with the file itself.

Jan 29, 2015 7:42 AM

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Question: Zip Archives won't unarchive...