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I have recently downloaded Bitcoin-Qt.app for Mac and subsequently the blockchain.  My startup disk is not very large and I would rather store the blockchain on another internal drive in my computer.

I have not been successful in doing so yet though after having read about using symbolic links and configuration files and datadir=<path> flags.  Using any of the mentioned methods has only led to Bitcoin-Qt either recreating the Bitcoin folder in Application Support or not syncing at all.  I have not found any solid help for Mac users (most of the help that I found involved people who are running Linux or Windows and explain how to do it for their OS and state that "it will be very similar for Mac").

Anyone out there who can point me to some useful info or tell me what I should be doing?

Thanks.