Check SHA1 Checksum on Mac OS

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SHA hashing is commonly used with distribution control systems to determine revisions and to check data integrity by detecting file corruption or tampering. For general use, a SHA checksum provides a string of characters that can be used to verify that a file was transferred as intended. If SHA checksums match, the integrity of the files is preserved.

This tutorial Will show you how to check the sha1 checksum of a file on Mac, but it works the same under Linux too.

How to Check SHA1 hash of a file in Mac OS X

Launch the Terminal, located in the Applications and Utilities folder, and use the following syntax:

shasum / path / to / file

To verify a file called “DownloadedFile.dmg” on the desktop, this would be:

shasum ~ / Desktop / DownloadedFile.dmg

This will yield something like:

$ shasum ~ / Desktop / CheckMe.zipddfdb3a7fc6fc7ca714c9e2930fa685136e90448 CheckMe.zip

That long hex string is the SHA1 hash.

It might look something like this in a Terminal window:

Check SHA1 Hash Checksum in Mac OS X

An easy way to check SHA1 files buried deep in the file system without typing the full path is to type in the first part of the command and then drag and drop the file to the Terminal window . This will automatically type the path for you:

shasum (drag and drop file here)

Don’t forget to put a space after “shasum” for this to work properly.

The default setting for the shasum command is to use SHA1, the most common hash type, but this can be changed with the -a flag to 224, 256, 384, or 512 if needed. Also, although SHA1 is becoming more common than MD5, you can also easily check md5 hash in Mac OS X with md5 command.

Examples of using SHA1 to verify files

So you might be wondering, when could you use this to verify the integrity of a file?

One practical use that Mac users may come across is to download software updates direct from Apple, which lists the SHA1 hash of each file served through their servers at the end of each download page. You can see such a string highlighted in the screenshot below. With this sha string, users can easily verify the integrity of their downloads, whether from Apple or when the file is hosted on a third party mirror site.

SHA1 Checksum on the Apple Downloads page

This is also how Mac OS X 10.7.3 was discovered to have been quietly updated, and several questions about it spawned this particular post.

Using SHA1 hash strings is also an easy way to verify file transfers from peer-to-peer networks and to make sure a download has completed or a file hasn’t been tampered with anywhere along the line . By knowing the original SHA1 checksum, you can verify that your version of the file (s) match and determine if the file is indeed valid and arrived as intended.

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Check SHA1 Checksum in Mac OS X: FAQ

Tutorial Summary: Check SHA1 Checksum in Mac OS X

In this guide, we told you about Check SHA1 Checksum in Mac OS X; please read all steps so that you understand Check SHA1 Checksum in Mac OS X in case if you need any assistance from us, then contact us.

How this tutorial helping you?

So in this guide, we discuss the Check SHA1 Checksum in Mac OS X, which undoubtedly helps you.

What is actual time in which this method complete?

The time to complete the Check SHA1 Checksum in Mac OS X tutorial is 10+ minutes.

What are the supported Device?

Apple

What are the supported Operating system?

mac OS


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