Files you download from the Internet are often compressed or zipped so that they take up less space and arrive much faster than files that haven’t been compressed. You can easily identify compressed files by their extensions, such as .zip (a common standard used in OS X and Windows) and .sit. Before you can use these files, you must learn how to unzip files on mac computers for proper access – luckily the process isn’t that complicated!

How to unzip files on mac computers

Unzipping a file on a mac computer is user-friendly and intuitive. To unzip files on a mac, simply follow the steps below:

1. Double click the zipped file.
2. The file will automatically be decompressed by Archive Utility into the same folder the compressed file is in.
3. Access the extracted files by clicking the appropriate icons.

By default, Mac OS X is incapable of handling these files. But this shouldn’t be much of an issue as there are lots of free archiving apps available that can open a.7z file and other file compression formats. The 7z file format is considered a better file compression format because of.

Alternatively, if the method above does not work, you can right-click on the .zip package, and select Open With > Archive Utility (default).

Apple and third party software

Apple used to include a program called StuffIt Expander to decompress zipped files, but doesn’t now that OS X lets you unzip files (but not .sit files). However, StuffIt from SmithMicro Software still comes in handy for opening other types of compressed files, notably the .sit or .sitx compressed types. Go to www.stuffit-expander.com or www.stuffit.com/mac/index.html to download a free version of the software or to splurge for the Deluxe version. In addition to compressing files, StuffIt Deluxe lets you encrypt and back up files.

Meanwhile, you can archive or create your own .zip files through OS X, which is useful if you’re e-mailing a number of meaty files to a friend. Right-click (or Ctrl-click) files you want to compress inside Finder and choose Compress Filename. The newly compressed files carry the .zip extension. The archive is created in the same location as the original file and is named originalfilename.zip. You can also choose File→Compress. If you compress a lot of files at once, the archive takes the name Archive.zip.

By default, compressed files are opened with the Archive Utility. It appears in the Dock (in Leopard) while the files are being unsqueezed, unless you choose to open them with Stuffit Expander or some other program.

How to zip files on a mac

On the flip side, you can also archive or create your own .zip files through OS X, which is useful if you’re e-mailing a number of meaty files to a client or friend. Follow the step-by-step instructions below to easily zip files on a mac:

1. Right-click or Ctrl-click the multiple files you want to compress (whether on the desktop or inside the Finder).
2. Select Compress Filename from the pop-up menu.
3. The files are now compressed in a .zip extension and the archive is created in the same location as the original file name, except with the .zip appended to its name.

On some Apple computers, you can also compress a file by simply choosing File→Compress. If you compress a lot of files at once, the archive takes the name Archive.zip.

7z is a compressed archive file format that supports several different data compression, encryption and pre-processing algorithms. The 7z format initially appeared as implemented by the 7-Zip archiver.

The 7z format provides the following main features:

• Open, modular architecture which allows any compression, conversion, or encryption method to be stacked.
• High compression ratios (depending on the compression method used)
• Rijndael/AES-256 encryption.
• Large file support (up to approximately 16 exbibytes).
• Unicode file names
• Support for solid compression, where multiple files of like type are compressed within a single stream, in order to exploit the combined redundancy inherent in similar files.
• Compression and encryption of archive headers.
• Support for multi-part archives : e.g. xxx.7z.001, xxx.7z.002, .. (see the context menu items Split File.. to create them and Combine Files.. to re-assemble an archive from a set of multi-part component files)

The format's open architecture allows additional future compression methods to be added to the standard.

While 7z compression uses the LZMA method by default, the 7z format also supports the PPMD, BCJ, BCJ2, BZip2, and Deflate compression methods.

The 7z format supports encryption with the AES algorithm with a 256-bit key. The key is generated from a user-supplied passphrase using an algorithm based on the SHA-256 hash function.

Open/Extract 7z File on Windows

7z is a native format of 7-Zip. To open/extract 7z file, you can use 7-Zip or Easy 7-Zip. The Easy 7-Zip is an easy-to-use version of 7-Zip. The open source freeware keeps all features of 7-Zip and adds a few useful features that makes the software more user-friendly.

Easy 7-Zip works on Windows 10/8.1/8/7/Vista/2008/2003/XP/2000 (both 32-bit and 64-bit compatible).

1. Free Download Easy 7-Zip
2. Install Easy 7-Zip by step-by-step instructions
3. The installation will associate 7z with Easy 7-Zip automatically
4. Double-click on 7z file to open 7z file with Easy 7-Zip

You will see files or folders within the 7z file then, click button Extract to extract the 7z file.

5. Alternatively, Right-click on 7z file on Windows Explorer

And then, choose Extract files.., Extract Here, or Extract to 'folder' to extract the 7z file.

6. Done

Easy 7-Zip Download Links:

Open/Extract 7z File on Mac

To open/extract 7z file on Mac, you can use B1 Free Archiver. B1 Free Archiver is a free software for creating archive folder and extracting archive file. B1 Archiver works on all platforms - Windows, Linux, Mac and Android. The freeware supports most popular formats including 7z.

B1 Free Archiver is compatible with:

• Mac OS X 10.9 Mavericks
• Mac OS X 10.8 Mountain Lion
• Mac OS X 10.7 Lion
• Mac OS X 10.6 Snow Leopard

Open/Extract 7z File on Linux

You need to install p7zip. p7zip is command line port of 7-Zip for POSIX systems like Unix (Linux, Solaris, OpenBSD, FreeBSD, Cygwin, AIX, ..), MacOS X and also for BeOS and Amiga.

Install p7zip-full on CentOS and Fedora

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Extract a 7z file on Linux

• 7za - command name
• e - specifies the 7z to be extracted
• sample.7z - is the file that is to be extracted

To extract with full paths, use the following command: