Development and Stable version on Mac

[Br. Samuel Springuel]

What's the simplest way to get both the development and stable version 
of lilypond running on a Mac from a user perspective?  I already have 
the stable version installed from the downloadable binaries and don't 
want to mess with this but also want to test some changes that have 
taken place in the development version to see if they solve some issues 
I've been having (some chatter on the list makes me think they might). 
I'm not planning on contributing modifications to the source as I'm too 
busy with other projects.
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Br. Samuel, OSB
(R. Padraic Springuel)

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