You are having the preset files but not the underlying impulse response data for REVerence. Could you please go in Finder to the location /Macintosh HD/LIbrary/Application Support/Steinberg/Content and in that folder (and all subfolders) have a look for any file with FCP_SMT_005_Reverence_ImpulseLibrary in it’s name. Can you find something?
Yes, they are the ones that are needed. And where are they located? Under /Macintosh HD/LIbrary/Application Support/Steinberg/Content/VSTSound ? If so, please do a double click on one of those files, what message do you get then?
No, 02 is for some other plug-in that is not included in Dorico.
Then I guess it is a file access right problem. Therefore please open a Terminal window (do a Spotlight search for it) and into that window copy and paste the command
After hitting the Return/Enter key that shall create the file SMTGContents.txt on your Desktop. Please zip that up and post as an attachment to a reply here. Thanks