[paul.j.ghosh]

OSX Version: 10.10.5 Yosemite
Platform: Mac mini (Late 2014)
Install Method: dmg
Version of Kodi/XBMC:  17.6 compiled Nov 14 2017

I am trying to get DD+ output as just DD since my preamp/decoder cannot handle DD+.  It can handle DTS.  The audio is via SPDIF/Toslink.  On searching I came upon an option called: DD+ (EAC3) capable receiver: on/off
That option does not show up in the audio settings.

In Audio Passthrough section the following is set:

Allow passthrough: on
Passthrough output device: Built-in Output, Digital Out
Dolby Digital (AC3) capable receiver: on
- Enable Dolby Digital (AC3) transcoding: on
DTS capable receiver: on

[paul.j.ghosh]

Never mind.  Kodi is sending out DD for a DD+ stream by default.