The following table provides a SHA-2 cryptographic hash for each of our apps. Huh? What’s all that gobbledygook mean? Basically, it means you can use these hash values to insure that the app(s) you download from our server match what we uploaded to our server.

How can you check your download? After downloading one of our apps, open Terminal (in Applications > Utilities), type shasum -a 256 and then press the space bar, but don’t press Return. Now drag in the disk image (DMG) you downloaded from our site, and press Return. Here’s what you’d see for Butler (version 4.4.8) if you were to do that:

$ shasum -a 256 butler448.dmg 
    b6877901f1c5b4d75cebe47fe5cecf461c1b424025b756e6b9efaa44ed9faf7f butler446.dmg

That big string starting with 7657735… is the SHA-2 hash, and that’s the value you want to check against the table below. If the string shown in Terminal differs from what’s shown in the table below for the same app, please let us know, and do not install the app!

Note: If you would like to verify an older version of any of our apps, please contact us with the app name and version number, and we’ll send you the SHA-2 hash.

SHA-2 hashes are long and complicated, so comparing them can be a bit of a pain. Here’s a way to make the task simpler. Assuming you’ve already downloaded an app, copy (double-click the hash then press Command-C) that app’s hash value from the above table.

Next, in Terminal, type expr `shasum -a 256 and press the space bar. Drag in the downloaded DMG file, which will add its complete path to what you’ve typed. Press the space bar again, then type (or paste) | cut -d ' ' -f 1` =. Finally, press the space bar once more, then press Command-V to paste your copied value. The final command will look something like this (for Butler 4.4.6):

expr `shasum -a 256 butler446.dmg | cut -d ' ' -f 1` = d7709fe1ea4e753a51300d1c4867add7794311618b3d1f1b7c19bc8d5e0e7f22

When you press Return, the output will either be 0 or 1. If it’s 1, all is fine—the above command compares the two values, and if they’re the same, it returns 1. But if you get a 0 as the returned value, then the hashes disagree. Please do not install the app you downloaded, and contact us immediately.

This table will be updated each time we update any of our apps.