What's the oldest Mac targeted by D programmers?

[Guillaume Piolat via Digitalmars-d]

On Tuesday, 6 December 2016 at 16:00:43 UTC, Nick Sabalausky 
wrote:
>
> "Latest is greatest" has become such a sacred cow in the tech 
> sector that far too few developers these days understand basic 
> common-sense logic like that.

I guess it's all about if you control the target hardware. It 
would be different for scientific software.