I am getting a memory error message that says that I "should consider using 64bit version". The only documentation I can find on that says to uncheck the "run in 32 bit mode" box in ARIA Player.app. I have done that. I am running ARIA version 1872, which I think is current. Using OS X 10.10.5 and Logic Pro X 10.2.4. Activity Monitor reports plenty of unused RAM (out of 16GB). For me, this is an crucial issue - can't do that for which I purchased JABB without being able to use all 16 slots.