I guess you missed this thread right below yours on the list:

https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=538589&gonew=1#UNREAD

It doesn't appear to be a PGM problem, it's Apple making their new OS 64 bit only.
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Biab/RB latest build, Win 10 64 bit, Intel 4770, 256 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.