starting to us jamoma, I just put the jamoma package in my /Applications/Max 6.1/packages folder.
If jamoma devs wrote it has not been tested with 64bit version, I tested it. Autocompletion works on the patcher (but not really jamoma)
When I open max in 32bit mode, autocompletion doesn't work but jamoma works (I can type the whole name of modules)
I just wanted to figure out the problem with autocompletion, because it is really useful, indeed.