A bit late to the party but I managed to resolve a ton of issues I was having with the Mac.
the path for the bind on my homecoming installation ended up being: /bind_load_file "Z:\Applications\coh\settitle.txt" With the settitle.txt being placed in applications\coh on the Mac
With regards to my chat log file it was in: applications\accounts\myaccountname\charactername\logs
Lastly, and this is not Mac specific, in order to actually get the web site to import my chat log, I had to manually create my character and manually add a single badge before it would import the log file correctly.
Hope this helps someone down the road.