Before the update, if i had latency or static when playing a beat, I could just cycle the power on the hardware and I would get the (hardware could not be found/software will produce silence) pop up windows but everything would reconnect, go back to normal and play perfectly. Now in 1.5, when I cycle the power on the hardware with the software still open, I get a blank LCD screen and both the software and hardware become unresponsive.
I can mouse click the mode buttons at the top of the software from main mode on down to midi mode and the screen changes to each mode (the LCD on the hardware comes back on and shows each mode as well). I can even add notes by mouse clicking but the hardware and the functions that correspond to the hardware are unresponsive. Transport, pads and banks, q-links unresponsive to mouse clicks in software.
Ok, so I go into preferences (because I use Soundflower/Soundflowerbed to sample internal audio) and change my input back to MPC Renaissance and I get a pop up that says something like "The sample rate could not be changed" and then my MPC Renaissance input and output selections disappear from the MPC software audio preferences Input/Output.
After doing this, the software and hardware became functional once again but playing audio thru the "Built-in Output". While computer volume control (F10Mute,F11VolDown and F12VolUp) do not function.
I can still select the MPC as an output and input for computer audio in system preferences>sound and it still is a selection in Soundflowerbed but it has disappeared from the MPC software audio preferences.
Upon close and restart of the MPC software, I got a pop up box saying my audio preferences have changed. Go into audio preferences and assign Input/output back to MPC Renaissance and everything is normal.
Cycled the power once again with input/output set to MPC Renaissance to see if it became unresponsive because I had different Input/Output assigned other than MPC Renaissance and same issue, hardware unresponsive.

OSX 10.8.5