How to verify checksum of downloaded file in mac

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Open Source Projects. In this tutorial we will learn to find checksum of a downloaded file in Mac using the terminal. Many utilities can verify the checksum of a file in Windows. Below are our favorite options, the Checksum Calculator, an easy to use and compare checksum utility and the FCIV command line utility from Microsoft.

The Checksum Calculator is a free file checksum calculation utility that supports the most commonly used file checksum algorithms, such as md5, crc32, and sha1.

The Checksum Calculator can also batch process multiple files and is an easy to understand and use Windows program. Unfortunately, no version of Microsoft Windows comes pre-installed with a checksum utility, but Microsoft has released a command line command perform a checksum.

WinDirStat is a great free utility for checking what files and folders are occupying space on your hard drive. Without knowing what to do, this number means nothing. To verify the checksum, first proceed with the download and wait for it to complete.

Then open the Terminal application in OS X and type the command "shasum" followed by a single space. After you do this, locate the downloaded disk image file, and drag it to the Terminal window to complete the full path to the image file. Then press Enter to execute the command, and a SHA checksum will be computed for the file. Now compare this locally computed checksum to the one listed on the download Web site, and if they match, the file has been verified.

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