7ZIP Mac files: how to extract and compress them

Allie Hawkins

There is a situation in which you cannot open on your Mac 7ZIP files. There may be several reasons for this. The first and the most common is the lack of a corresponding 7 ZIP Mac application among those installed on your computer. So, what is 7ZIP? And why it causes so many troubles for the users. The 7z or 7ZIP extension is a common data compression format that allows you to convert any files into a compact archive. For example, in one 7ZIP Mac archive, there can be many documents of different types, a whole folder with pictures, a program, etc. In brief, 7ZIP files are simply compressed data in the form of a single archive. They can often be found when you download something online. If earlier, 7Zip format was limited only to the world of Windows so now such archives are often created and used in Mac OS. A feature of this format is that it supports several data compression and encryption algorithms, which makes it unique and universal, suitable for any files. It has a high compression ratio, is characterized by an open architecture, provides an opportunity to choose a method of compression and file encryption and has strong compression. In addition, another feature of the format is the fact that, unlike many other options, it is able to work with files up to 16 GB. The file with the 7z extension is an LZMA archive, which can contain almost any type of files inside, including very large files. Definitely, the easiest way to solve this problem is to find and download the appropriate 7ZIP for Mac application or so-called 7Zip extractor programs.


  1. Possible problems with files in 7 ZIP for Mac
  2. 7 ZIP Mac file technical details
  3. How to use 7Zip alternatives on Mac
  4. How to compress files via Mac 7ZIP alternative - Commander One

Possible problems with files in 7 ZIP for Mac

The inability to open and work with 7ZIP file does not necessarily mean that you do not have appropriate 7Zip extractor installed on your computer. There may be other problems that also block your ability to work with the 7Zip files. Below you can find a list of possible problems.

  • Damage of the opened 7ZIP file. The workaround here is to find a new version of it or download it again from the same source (maybe for some reason in the previous session the download of the 7Z file has not been completed and it cannot be opened properly).
  • Incorrect links to the 7ZIP file in registry entries.
  • Accidental deletion of the description of the 7ZIP extension from the registry.
  • Incomplete installation of an application that supports 7ZIP format.
  • The 7ZIP file which is being opened is infected with an undesirable malware.
  • There is too little space on the computer to open the 7ZIP file.
7zip mac

If you are sure that all the listed reasons are missing in your case or you have already excluded them, then 7ZIP file should cooperate with your 7ZIP file manager without any problems. If the problem with “7ZIP cannot open file as archive” is still not solved, it may mean that in this case, another, rare problem appeared with the file. In this case, it remains only the help of some specialist.

7 ZIP Mac file technical details

7ZIP files can be multi-volume archives that can be converted to one file after the archive has been transferred by volume. It should be noted that the 7ZIP format does not support the storage of file system access rights (UNIX ACL or NTFG), i.e. using the 7ZIP format for backup and archiving can be problematic due to the ability to bypass protection. Besides that, 7ZIP format allows you to reach 4–25% better compression ratio than the ZIP format. 7ZIP is considered to be "protected from obsolescence" because it is supported by a large number of new 7ZIP extractor apps. Currently, 7ZIP is an open-source extension available for public use since 2008. Compression methods that support 7ZIP files are LZMA, PPMD, BCJ, BZip2 and Deflate. The open architecture allows you to put methods of compression, conversion, and encryption in the queue. This type of files is used to store and send/receive very large files or their groups. Nevertheless, files with the extension .7zip can be run only by some 7Zip Mac, Windows, Android, Linux programs. It is possible that .7z are data files, not documents or media, which means that they are not intended to be viewed at all.

7zip for mac

How to use 7Zip alternatives on Mac

How to open 7ZIP Mac archives on your computer? If you want to be able to open the file by double-clicking it using the native archiver in macOS, well, we do not want to upset you, but it is impossible. In this case, you need to download and install one of 7 Zip Mac alternative apps.

Commander One is a great 7ZIP file manager thanks to which you can create and extract archives just with a couple of clicks. It is a rather efficient file manager with a dual-pane interface and all the necessary features. It is all in one solution that can be a cup of tea for all the users from newbies to savvy ones. The app can not only work as a powerful archiver that supports all the popular archive types (TGZ, TBZ, ZIP, RAR,7ZIP, etc.) but also provides access to cloud storages and remote servers directly through its interface and many more.

how to use 7zip

How to compress files via Mac 7ZIP alternative - Commander One

  • Choose the files you want to compress. Right-click them and from the context menu choose “Compress selected file(s)” option. By default, all the archives will be saved in .zip format. However, you can easily change it to 7ZIP in Commander One Preferences -> Archive Tab. After compressing the files the archive will appear in the same pane.

  • If you want to compress files and move 7 ZIP Mac archive to the second pane simultaneously, follow the steps below:

    1. Set the source folder (directory) in one pane, and the target one in the other.
    2. Choose the files you want to archive and move in the left pane and the target directory in the right pane. After that, click the Archive toolbar button. Select the archiver type and customize compression settings.

Tips: in order to open the archive to see its contents, click Enter. Use Alt + Enter to open the file in an archiver program. To compress files use Ctrl + F5 and if you need to compress with options use Ctrl + Alt + F5.

Commander One

  • Requirements: MacOS 10.10+. 13.1Mb free space
  • Version 2.3(3105). (6th Oct, 2019). Release notes
  • Rank 4.5 based on 89+ users, Reviews(15)
  • Category: Utilities