Reviews and questions about the entry-level MPC500
By Dan Ecclestone Tue Sep 24, 2019 10:11 am
I'm following MPC tutor's advice to upgrade (my OS is currently 1.13) to OS 1.31. I've downloaded the new software from, and tried unzipping the mpc500.bin file from my downloads. Stuffit Expander throws up a dialog saying 'The Stuffit Engine was unable to determine the file format.'

Any ideas how to get 1.31 unzipped and installed? I'm on Mac OS Sierra