Can you confirm the correct version of Lr that you have? "CC10.12" does not describe the current version,
which should be- CC 2015.10 [ 1111918 ]
"Camera Raw" is not used by Lightroom (only Photoshop) so is not relevant to your problem.
Open Lightroom and click [Help] > [System Info], and quote the first line "Lightroom Version" in the information panel.
I have Lightroom CC 10.12, and Camera Raw CC 9.9, my camera is a Canon EOS M5,
There is no Lightroom CC 10.12. The current version is Lightroom CC 2015.10.
In Lightroom, click Help > System Info and tell us which version of Lightroom is shown.
For the M5 you need CC 2015.8 or later.
Thanks for the quick reply!
CC 2015  is what it says.
You both asked the same question, and CC 2015  is the answer!
Downloaded, and now I'm being told the update could not be applied because updates have been suppressed by the Administrator.
Except I am the Administrator, and web searches tell me I should delete or rename "AdobeUpdaterPrefs.dat" from "/Users/<username>/Library/Application Support/Adobe/AAMUpdater/".
Yet even after doing that it fails.