I want to do a checksum on a file I downloaded on my Mac. How can I do this?
1 Answer
In a terminal window type the md5 command followed by the file location.
md5 Downloads/myfile
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1For SHA-1:
openssl sha1 <file>
. Other algorithms also available; see [ openssl ](developer.apple.com/mac/library/documentation/Darwin/Reference/…). If you want an old school checksum see [ cksum ](developer.apple.com/mac/library/documentation/Darwin/Reference/…) (MD5 and SHA-1 are actually cryptographic hash functions, not simple checksums). Jun 9, 2010 at 9:35