[GNC] "No mountable file systems" macOS DMG

[John Ralls]

> On Jan 5, 2020, at 9:13 AM, Gabriel <blackbox+gnucash at inanutshell.us> wrote:
> 
> The downloads page for Gnucash lists the mac requirements as ">= 10.9
> (Mavericks)" but the dmg appears to be in APFS format, which is, I believe,
> 10.13+.
> 
> It'd be rad if you guys would release a non-APFS dmg! :-)

Done, Gnucash-Intel-3.8-3.dmg at both SourceForge and Github.

Regards,
John Ralls