On Mac:
Navigate to the plugin > Show package contents > Mac OS > Omnisphere >Get Info > change permissions to read & write for all users listed.
Do the same for the Application in the Applications folder. Don't forget to return the permissions to their original state after patching and
authorising.
HI Hope its not too late Go to the the library folder - audio - plug-in - vst you will find omnisphere.vst right click show package content open content - macOS then you ill find the omnisphere that you suppose to give it a permission right click Get Info then bellow there sharing and permissions unlock the lock . change ( wheele and everyone) from Read to Read&write . Done
then use the patch on the omnisphere file