Calculate SHA1 on OSX Jun 6th, 2012 1 2 $ echo "my string here" | openssl sha1 (stdin)= 0669c6958b14ae3454f8679ec12adbefadef5440 Alternatively, 1 2 $ echo "my string here" | shasum 0669c6958b14ae3454f8679ec12adbefadef5440 -