First off, a.7z file is an archive format that stands for 7-zip, you can think of it like any other archive file. By default, Mac OS X does not know how to handle these files, but that's not a big deal because there's a freely available app that will open the.7z file for you, offering simple access to extract the 7zip archive and get to. With WinZip for Mac 2.0 or later, you can right-click (or press CTRL and click) your saved Zip files and use the Context Menu to unzip them. Click on Services at the bottom of the Context menu, then choose Unzip, Email as Zip File and Add to Zip.
7z is the new archive format, providing high compression ratio.
- 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.
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The main features of 7z format:
- Open architecture
- High compression ratio
- Strong AES-256 encryption
- Ability of using any compression, conversion or encryption method
- Supporting files with sizes up to 16000000000 GB
- Unicode file names
- Solid compressing
- Archive headers compressing
7z has open architecture, so it can support any new compression methods. Now the following methods are integrated to 7z:
| Method | Description |
|---|---|
| LZMA | Improved and optimized version of LZ77 algorithm |
| LZMA2 | Improved version of LZMA |
| PPMD | Dmitry Shkarin's PPMdH with small changes |
| BCJ | Converter for 32-bit x86 executables |
| BCJ2 | Converter for 32-bit x86 executables |
| BZip2 | Standard BWT algorithm |
| Deflate | Standard LZ77-based algorithm |
LZMA is default and general compression method of 7z format. Google drive for pc. The main features of LZMA method:
- High compression ratio
- Variable dictionary size (up to 4 GB)
- Compressing speed: about 1 MB/s on 2 GHz CPU
- Decompressing speed: about 10-20 MB/s on 2 GHz CPU
- Small memory requirements for decompressing (depend from dictionary size)
- Small code size for decompressing: about 5 KB
- Supporting multi-threading and P4's hyper-threading
LZMA compression algorithm is very suitable for embedded applications. LZMA is released under the terms of the GNU LGPL. LZMA is also available under a proprietary license for those who can not use the GNU LGPL in their code. If you want to use LZMA code, you can ask consultations, custom code programming and required developer licenses from page for support: Send message to LZMA developer. Check also information about LZMA SDK.
7-Zip also supports encryption with AES-256 algorithm. This algorithm uses cipher key with length of 256 bits. To create that key 7-Zip uses derivation function based on SHA-256 hash algorithm. A key derivation function produces a derived key from text password defined by user. For increasing the cost of exhaustive search for passwords 7-Zip uses big number of iterations to produce cipher key from text password.
7z is a part of 7-Zip program distributed under the GNU LGPL. You can download 7-Zip sources and binaries from Download Page.
Applications that support 7z archives: WinRAR, PowerArchiver, TUGZip, IZArc.
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Making Zip archives on Mac OS X is not a difficult task. The necessity of making a zip archive comes for all the users in one or the other way. Some makes zip archives by compressing a large number of files to free some space on their systems and some used this advance technique to transfer large number of files over a network.
Mac OS X Finder provides an option to make zip formatted compressed archives of multiple files. Compressed archives provide a fast and handy method to decreases the size of one or more files or folders prior to transferring them over the network and provides easy for data backup. Here are a few simple instructions that will help you to save memory space on your Mac OS X system.
7 Zip Archive Mac Outlook
- In an open Finder window right-click on a file, folder, or files you wish to zip archive
- You can select all files using 'command-A' or Shift-click to individually choose the multiple files
- Ctrl-click on files and choose 'Compress Items'
- Find the newly created .zip archive in the same directory
7zip Archive Command
By following these steps carefully you can create a successful zip archive file. However, some users find difficulty in creating zips archive and some of them use third party application to zip several files. By utilizing Remo Zip for Mac application one can easily create zip archives on Mac OS X. It is the most secure and dynamic utility to compress files on Mac machines. This advance freeware application offers 10 different levels of file compression and you can easily compresses any number of files without loss of data.
