Matt/Jay,
Do you have a page anywhere which says which versions of OSX you support?
On the downloads page, it says 10.7.5 Lion or later - but I know from the forums that you don't support High Sierra.
Is Sierra (not High Sierra) officially supported now?
I ask cos I'm still on Mavericks and want to update so I can install current backup software, but before High Sierra comes out on Monday.
Peter