I guess this is a continuation of these two questions:
Does the Mindstorms EV3 software run on OS X El Capitan?
Is the LEGO Midstorms EV3 software compatible with OS X yosemite?
macOS Sierra was just released, and I want to upgrade. Will there be issues with the software, or will it work properly?
My Mac: Retina MBP 13", Early 2015
I have a Mac Mini with macOS Sierra, and the LEGO software works on it for me.
FWIW, LEGO MINDSTORMS EV3 Home Edition was crashing on startup (latest Mac OS X Sierra du jour: 10.12.6 16G1113) — presumably (from callisto's answer) because my installed version of Mono was too recent. I uninstalled Mono by typing the following commands in a Terminal:
sudo rm -rf /Library/Frameworks/Mono.framework
sudo pkgutil --forget com.xamarin.mono-MDK.pkg
sudo rm -rf /etc/paths.d/mono-commands
Afterwards, I uninstalled and reinstalled LEGO MINDSTORMS EV3 Home Edition from its official source and I could successfully run it. FWIW, the version of Mono that LEGO MINDSTORMS EV3 Home Edition installs for itself is 2.10.9:
# ls -l /Library/Frameworks/Mono.framework/Versions/ total 8 drwxrwxr-x 12 root wheel 408 8 mai 2012 2.10.9 lrwxr-xr-x 1 root wheel 6 25 nov 12:46 Current -> 2.10.9
Beware though. If you install Xamarin on your OSX machine, it will grab the latest Mono framework which is NOT compatible with the EV3 software (I don't recall which MONO version is used by EV3 software).
I have contacted Lego support a few times, and they are not going to update their OSX software. You will either have to then use a different machine or a VM to run the EV3 software.
