Euterpea e fluidsynth em um Mac: mais problemas

Em uma pergunta anterior https://stackoverflow.com/questions/53977864/installing-euterpea-for-computer-music-applications-and-haskell (que se refere a essa pergunta Euterpea e fluidsynth em um Mac também), sobre a instalação do Euterpea em um Mac via terminal, fui avisado para inserir o comando

fluidsynth -s -a coreaudio -m coreaudio /usr/share/sounds/sf2/FluidR3_GM.sf2

Disseram-me que se eu não conseguisse encontrar o arquivo FluidR3_GM.sf2, é provável que ele tenha sido instalado em um local diferente e que, como último recurso, eu poderia apenas baixar um arquivo soundfont e usá-lo, e não o fornecido pelo FluidSynth.

Quando procuro o arquivo FluidR3_GM.sf2, recebo os seguintes erros. O que eu posso fazer? Além disso, como posso executar o comando acima com sucesso?

 Mo-MacBook-Pro:app Mo$ sudo find / -name FluidR3_GM.sf2
 Password:
 find: /private/var/db/ConfigurationProfiles/Store: Operation not permitted
 find: /private/var/folders/tw/v9nkymhj461_yh7bl98n90k80000gp/0/SafariFamily: 
 Operation not permitted
 find: /private/var/folders/tw/v9nkymhj461_yh7bl98n90k80000gp/0/com.apple.
 Safari/SafariFamily: Operation not permitted
 find: /private/var/folders/tw/v9nkymhj461_yh7bl98n90k80000gp/0/com.apple.
 LaunchServices.dv: Operation not permitted
 find: /private/var/folders/tw/v9nkymhj461_yh7bl98n90k80000gp/0/com.apple.
 nsurlsessiond: Operation not permitted
 find: /private/var/folders/tw/v9nkymhj461_yh7bl98n90k80000gp/0/com.apple.
 routined: Operation not permitted
 find: /private/var/folders/tw/v9nkymhj461_yh7bl98n90k80000gp/C/com.apple.
 QuickLook.thumbnailcache: Operation not permitted
 find: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000sm00006d/0: Operation not permitted
 find: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000sm00006d/C: Operation not permitted
 find:/private/var/folders/zz/zyxvpxvq6csfxvn_n00000y800007k/0/com.apple.nsurlsessiond: Operation not permitted
 find:/private/var/folders/zz/zyxvpxvq6csfxvn_n00000z000007r/0/com.apple.nsur. 
 lsessiond: Operation not permitted
 find: /private/var/folders/zz/zyxvpxvq6csfxvn_n00000z000007r/0/com.apple.routined: Operation not permitted
 find: /private/var/folders/dy/q51p3v595kbd8_wclmt80v700000gn/0/SafariFamily:Operation not permitted
 find: /private/var/folders/dy/q51p3v595kbd8_wclmt80v700000gn/0/com.apple.Safari/Sa      
 fariFamily: Operation not permitted
 find: /private/var/folders/dy/q51p3v595kbd8_wclmt80v700000gn/0/com.apple.LaunchServices.dv: Operation not permitted
 find: /private/var/folders/dy/q51p3v595kbd8_wclmt80v700000gn/0/com.apple.nsurlsessiond: Operation not permitted
 find: /private/var/folders/dy/q51p3v595kbd8_wclmt80v700000gn/0/com.apple.routined: Operation not permitted
 find: /private/var/folders/dy/q51p3v595kbd8_wclmt80v700000gn/C/com.apple.QuickLook.thumbnailcache: Operation not permitted
 find: /private/var/folders/8m/0brzdqzx4vs_r1lj2n2qnk7c0000gq/0/com.apple.LaunchServices.dv: Operation not permitted
 find: /dev/fd/3: Not a directory
 find: /dev/fd/4: Not a directory