View the most recent changes for the zsync port at: zsync.darwinports.com/diff
Scroll down toward the bottom of the page to get installation instructions for zsync.
The raw portfile for zsync 0.5 is located here:
http://zsync.darwinports.com/dports/net/zsync/Portfile
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Check for any related Fink projects here: pdb.finkproject.org/pdb/package.php/zsync

The zsync Portfile 30239 2007-10-23 01:55:09Z jmpp macports.org $

PortSystem 1.0
Name: zsync
Version: 0.5
Category: net
Maintainers: nomaintainer
Description: file transfer program
Long Description: zsync is a file transfer program. It allows you to download a file from a remote web server, where you have a copy of an older version of the file on your computer already. zsync downloads only the new parts of the file. It uses the same algorithm as rsync.
Platform: darwin
Homepage: http://zsync.moria.org.uk/
Master Sites: http://zsync.moria.org.uk/download/
Checksums: md5 08beaf3fa95f16d8a2db2f7f3ea21196 sha1 25919b085d96f478f60e1de4a2b09468eaa2be5f
use_bzip2 yes
configure.args --mandir=${prefix}/share/man

If you haven't already installed Darwin Ports, you can find easy instructions for doing so at the main Darwin Ports page.
Once Darwin Ports has been installed, in a terminal window and while online, type the following and hit return:

%  cd /opt/local/bin/portslocation/dports/zsync
%  sudo port install zsync  
Password: 

You will then be prompted for your root password, which you should enter. You may have to wait for a few minutes while the software is retrieved from the network and installed for you. Y ou should see something that looks similar to:

--->  Fetching zsync
--->  Verifying checksum for zsync
--->  Extracting zsync
--->  Configuring zsync
--->  Building zsync with target all

--->  Staging zsync into destroot

--->  Installing zsync

- Make sure that you do not close the terminal window while Darwin Ports is working. Once the software has been installed, you can find further information about using zsync with these commands:

%  man zsync
%  apropos zsync
%  which zsync
%  locate zsync

 Where to find more information: