Glad it was sorted.
With the issue in 2016, I think it was something on the server side of things. I think I asked the dev team and they made sure the file was working.
I do use a mac.
And I would suggest using 2.81, it’s much better than 2.80 because they have already added a lot of the missing features 2.80 was meant to get but didn’t. Although the Mac builds seem to have more bugs than the other versions. (but it’s still less than the official 2.80 release)