you can try to open the terminal and chmod the folder MacOS after you type this command sudo chmod -R 777 "Drag and Drop the folder MacOS into...
I never try it because I'm not Cubase user but if you can snapshot the whole folder and upload here the picture I will try to figure which one...
here I made a video show you how the hackers use this Ransomware to decrypt all files ! this will help you next time when you open dmg always...
you can use it in any Osx but why should you do it on Sierra ? if you can put the libstdc++.6.dylib to usr/lib/libstdc++.6.dylib
alway's using Pacifist to check the dmg file because I saw new attacks used by hackers they put install file and folder which called .hidden...
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