Bug reports & end-user support for Akai's MPC Software 'controllers' including the new MPC Studio 2, the MPC Touch, MPC Renaissance & original MPC Studio and MPC StudioB lack.
By Cinetrax Tue May 17, 2016 6:25 pm
1.9.5. VST plugin still makes Nuendo 7.0.35 on Mac OS 10.11.5 to crash on launch (as 1.9.4 and 1.9.3 did).

I have to remove MPC plugin 1.9.5 (as I did with 1.9.4 and 1.9.3) to open Nuendo projects and keep on working. Therefore, no projects including MPC plugin

This issue has been reported as well on official MPC forum by people trying to use 1.9.4 VST on Mac El Capitan

Only solution is to use 1.8.2 VST. Standalone 1.9.5 works fine.