Downloaded the trial version (1.81 Mac OS), which states that it's compatible with 10.10.5 and up. It's working fine on all my DAWs... until I switch internet off. Of course, we all know what happens next... Unable to open existing instantiations of the plugin, or add new. All DAWs, though, see the plugin as validated... so... I suspect that the plugin is continually doing a call-out, and when that fails it fails. Turn on the internet, and guess what... Helix Native all of a sudden works! Turn wifi off, and guess what...