Hi,
audio item drag & drop from Reaper's timeline into third party samplers via cmd+option+drag does not work anymore on Mac for third party plugins
it's only still working into Reasamplomatic for me.
not sure wether it's just a devilish thingie since i'm on 6.66 on Mac, but it is working on my Windows machine, which is still running a slightly older version of Reaper
Host->Plugin Audio Drag & Drop
Threaded Mode