- Unable to unzip file mac error 79 zip file#
- Unable to unzip file mac error 79 archive#
- Unable to unzip file mac error 79 iso#
I ran it on the problematic file like this: The zip tool has a switch that can be used to test the integrity of a ZIP file. Since these tests demonstrate that both unzip and 7-zip are able to handle both large ZIP files (which by definition use ZIP64) as well as smaller OneDrive ZIP files, this suggests that something odd is going on with OneDrive’s implementation of ZIP64. Again, both extracted these files without any problems. I then tried to extract both files with both unzip and 7-zip (i.e. Next I created two 8 GB ZIP files from data on my local machine with both the zip and 7-zip tools. Both were able to extract the file without any issues.
Unable to unzip file mac error 79 zip file#
First I downloaded a smaller (<4 GB) folder from OneDrive, and tried to extract the resulting ZIP file with unzip and 7-zip. I did some additional tests to verify if my problem could be a ZIP64-related issue. Small OneDrive ZIP and home-rolled large ZIP To be sure, I verified that both unzip and 7-zip on my machine support ZIP64 1. To overcome these limitations, a “ZIP64” extension was added to the format in version 4.5 of the ZIP specification (which was published in 2001).
Unable to unzip file mac error 79 archive#
The Wikipedia entry on ZIP states that originally the format had a 4 GiB limit on the total size of the archive (as well as both the uncompressed and compressed size of a file). 4 GiB size limit and ZIP64Īt this point I started wondering if these issues could be related to the size of this particular ZIP file, especially since I have been able to process zipped OneDrive folders before without any problems.
Unlike unzip, 7-zip does succeed in extracting some of the data, but seeing that the size of the extracted folder is only 4.3 GB, the extraction is incomplete (the size of the ZIP file is 6 GB!). Here we see the familiar “Headers Error” and “Unconfirmed start of archive” errors, as well as a warning about a cyclic redundancy check that failed on an extracted file. 6.0) using the following command:ħ-Zip 16.02 : Copyright (c) 1999-2016 Igor Pavlov : Extracting with UnzipĪs a first test I tried to extract the file from the terminal using unzip (v. This all looked a bit worrying, so I decided to have a more in-depth look at this problem. No actual data were extracted whatsoever. It also reported a warning that “There are data after the end of archive”. The output from the underlying extraction tool ( 7-zip) reported a “Headers Error”, with an “Unconfirmed start of archive”. When I tried to extract this ZIP file with my operating system’s (Linux Mint 19.3 MATE) archive manager, this resulted in an error dialog, saying that “An error occurred while loading the archive”: Since I wanted to work with these files on my Linux machine at home, and no official OneDrive client for Linux exists a this point, I used OneDrive’s web client to download the contents of the folder.
Unable to unzip file mac error 79 iso#
The other day a colleague used OneDrive to share a folder with a large number of ISO images with me. We recently started using Microsoft OneDrive at work.
“Broken zip £12.50” by dichoecho, used under CC BY / Cropped from original.