So, this may be helpful to anyone else having the same issue. I was browsing the Repos and noticed that the newest LibRaw .0.19.6 with CR3 support are in the repos for all versions of the ubuntu/raspbian base, except for 16.04. I Have been using Stellar Mate v 1.3.0 which has a 16.04 base for several years. I found another SD card and put 1.5.1 on it and started setting it up and using it last night. CR3 and the EOS R work fine in this release. I ran into some other issues which I opened a ticket on, but I don't think they are directly related to CR3 so I wont include them in this thread. I think that for most people using 1.5.0 or 1.5.1 (using 19.04 base) with an EOS R/RA/RP will probably work fine. Check with the command lsb_release -a if you are on 16.04 this is probably the reason for now CR3 support, and I would suggest upgrading to a newer version of Stellar Mate OS.

Side Note, I realize looking back that the original question was for a Macbook Pro. I am not sure what needs to be done here to get CR3 support, if you are directly connecting your equipment to a macbook pro. I use my macbook pro to remotley connect to a stellar mate OS device, and since upgrading it to 1.5.1 I haven't had any issues using my MBP for all features. However these days I prefer to remote into the Stellar Mate OS device and setup everything on the device itself, that way I can disconnect and it will continue to run until finished, so I don't use kstars on my MBP so much anymore. I wish I could be of more help in that area.

--Miles

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