[PD] Several questions about Gem and Pd vanilla (Mac OS X 10.13)

[Dudley Brooks]

Many of the answers I find online are not dated, so I'm not sure what 
the most recent info is.

(1) Is there an information source which is guaranteed to be the most 
up-to-date for Pd, and similarly for Gem?

(2) Is it true that Gem will only work with 32-bit versions of Pd? Or is 
that a now-outdated version of Gem?

(3) What settings do I use to make sure that Gem is found by any Pd 
patch opened by clicking on it or by clicking on the Pd app and then 
opening the patch from Pd?

or

(4) If I don't do (3), what do I include in a Pd patch to make sure the 
patch loads Gem?

Thanks.  Newbie to Gem, still somewhat newbie to Pd.