Somewhere along the way CF was installed into the CFMX user directory which was causing my confusion. This is the one I could see in the Finder and the one where I was saving the 'coldfusionosx' file.
I understand now that we're looking for CF in the root directory and this is where I should save the 'coldfusionosx' file. It seems that CF did install into the root, but is invisible in the Finder. I can see it 's there with Terminal, but I cannot save to the bin from my text editor. I deleted CF from the CFMX user directory and went back a few steps and expanded the file again using 'gnutar'. I still cannot view the directory from the Finder, but it is there. I noticed this in Terminal after the long list of expanded files:
/usr/bin/gnutar: Error exit delayed from previous errors