sha1 Checksums

Based on [] as of 2010-05-15:

  • Apple recommends the use of the so-called SHA1 standard (Secure Hash Algorithm Version 1). Apple is using this method for their own security updates as well. For more information please also refer to Apple Support Article HT1652.
  • Perform the following steps:
    • Make sure you have the downloaded file displayed somewhere in the Finder.
    • Open the Terminal application.
    • Enter the command: [/usr/bin/openssl sha1 ] with a space at the end (not a Return).
      • Note the last character of ‘openssl’ is a small ‘L’ not a ‘1’
    • Drag the target file from the Finder window into the Terminal window. A path specification will appear in the Terminal window.
    • Now press the Return key (Enter).
    • You will see output similar to the following example:
      • SHA1(path specification)= 2eb722f340d4e57aa79bb5422b94d556888cbf38.

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