A few comments.
You do not say what your current Mac is nor what version of BIAB you are running — it definitely can make a difference.
Not criticizing your comment just want to point out the information provided in megamads signature
Music teacher and professional guitar player.
Have BIAB 2017
Using Imac OSX Sierra
Plays Country, Blues and RnB
I truly do not understand megamads comment(s)
Except when running BIAB. It freezes, functions stop working and disappear.....and its SO INCREDIBLE SLOW !!!
That certainly has not been my experience .