GarageBand Instruments Won't Work
I imported the Orchestral Symphony jam pack into GarageBand using the loop browser and drag and drop. All of the soundbytes work great, but the green ones (the midis) only work when you sample them. If you place them in the mix, they play out as a sine wave. (I've tried them multiple times, and it's always the same.)
I am running the older version of GarageBand. (Before v10.0) The files I added were .caf files.
iMac, OS X Mavericks (10.9.5)