This is the command line version of the OSX Blesser. It has one major 
flaw in that at the time I wrote it it was extremely difficult to 
determine the disk size. Therefore the size of the disk is a user input 
(in blocks). 

To determine the disk size the best program I've found is the 
IORegistryExplorer program provided in the developer installs of OSX. 
Warning: The Explorer provided with 10.2 appears to report drive size in 
bytes while previous versions reported them in 512 byte blocks. The 
Blesser deals with blocks only.

Instructions:
OSXv4Blesser device devicesize
where device is the /dev/disk## for the drive and devicesize is the 
drive's size in blocks. Other options are available for the brave. 

If you use this program and have problems with it please let me know at 
wagnerec@lvcm.com. As far as I know only one person has gotten it to work.