Yes, sorry if I am not being too clear. I only have experience directly using the Stellar Mate OS. I also believe the initial question is specific to kstars/ekos for MacOs. For a brief period I running individual pieces of INDI, in a ARM version of fedora, but I moved to Stellar Mate OS to help support Jasems product to use on my own RPi, as well as have support since I am more of a linux admin than I am a developer, and I am unfamiliar with how all of the pieces come together to form Ekos, so I decided to use the packaged OS. I ran and lsb_release -a and noticed that the output was Raspbian 16.04 LTS. Then I checked Jasems PPA, which feeds updates to Stellar Mate here :
. On the last page it lists LibRaw : 0.19.6~202002010816~ubuntu19.04.1 0.19.6~202002010816~ubuntu19.10.1 0.19.6~202002010816~ubuntu20.04.1 and 0.19.6~202002010817~ubuntu18.04.1. So I downloaded the latest Stellar Mate OS 1.5.1 which appears to be using the 19.10 base, and sure enough dpkg shows libraw 0.19.6 and my EOS R is working.