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How to Unzip a CPGZ File on Mac OS X

For those that are having issues with opening a zip file and converting it to a CPGZ file, we have a guide to help learn how to unzip a CPGZ file on Mac OS X. For those who ask what is a cpgz file, cpgz is a compressed archive that combines the Copy In, Copy Out archive format and gzip compression. A cpgz file is similar to a tgz file that uses a gzip compression and tar container on Mac OS X and Linux operating systems. If for some reason you’re not happy with your computer, you can sell your phones and electronics for cash with Gazelle Trade-In. [1]

A common issue when Mac OS X users try to open a zip file and convert it to a cpgz file is that there are several issues that happen. Sometimes, when the zip file is unzipped, it converts to a cpgz file and when Archive Utility is launched, the file turns back to a zip file. This process continues in a loop, making it almost impossible to unzip a cpgz file on Mac OS X. Below are some of the reasons that this happens and how to fix these issues as well.

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Reasons for these issues happening


Download the File Again with a Different Browser
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Some web browsers don’t correctly download the original file and may work using a different browser like Safari, Google Chrome or Firefox. Generally this will fix the solution as the file was not downloaded correctly, thus causing these issues. There are also two other methods that should help fix this issue and can be found below.


Install & Use The Unarchiver

Another option is to download and install The Unarchiver. This is a third party app that is great for compression formats and used to archive any file format. The Unarchiver is similar to the standard default Archive Utility found on Mac OS X. This tool is great for fixing the zip/cpgz files problems on Mac OS X:

  1. Download and install The Unarchiver [5]
  2. Open the file that is having the issue on .zip or .cpgz file using The Unarchiver and let it decompress


Unzip from the Command Line

If the two methods from above don’t work, a third option to unzip a cpgz file on Mac OS X is to use the command line unzip tool. Generally this is used to break archives out of the .zip to .cpgz cycle. The steps below will show how to do this for the original .zip archive:

    1. Turn on your Apple computer
    2. Open Terminal
    3. Find the .zip file in the Finder
    4. At the command line type “unzip ” followed by a space
    5. Drag and drop the .cpgz or .zip file into the terminal window and hit enter


    The command line method generally works the majority of the time to fix the issue and unzip a cpgz file on Mac OS X. The best solution would be to download the file again using a different browser and the unzipping process should work correctly.


    If for some reason you’re not happy with your computer, you can sell your phones and electronics for cash with Gazelle Trade-In. [1]