I was a bit surprised to learn that my Mac didn't have the md5sum and sha1sum tools installed by default. A quick search and I found a site that provides the source. The sources compiled successfully on my Mac (OS X 10.5.5, xCode tools installed).
The only quirk appears in the last step:
$ sudo make install
cp md5sum sha1sum ripemd160sum /usr/local/bin
chown bin:bin /usr/local/bin/md5sum /usr/local/bin/sha1sum
chown: bin: Invalid argument
make: *** [install] Error 1
make install command tries to change the ownership of the files to the
bin user. Since that user doesn't exist on my system, the command fails. This isn't a problem though, as both binaries work perfectly. By default, they are installed to
Using the OS X md5 instead of md5sum
As a commenter pointed out, the
/sbin/md5 utility provided by OS X contains a hidden
-r switch that causes it to output in a format identical to that of md5sum, making it compatible with scripts that require md5sum's format. If you want to use the md5 utility provided by OS X, you can add the following to your
alias md5='md5 -r'
alias md5sum='md5 -r'
Installing with HomeBrew
A commenter mentioned that you can install
md5sum using HomeBrew by running
brew install coreutils.
Update (2015-02-25): The current method for installing via HomeBrew is as follows:
brew install md5sha1sum
Installing with MacPorts
A commenter mentioned if you have MacPorts installed, you can run
port install coreutils but "you’ll need to add
/opt/local/libexec/gnubin/ to your
Update (2014-08-25): It appears that you should use
sudo port install md5sha1sum.