Which OS is closer to chess

Let's say for a matter of simplification that there are five kinds of OSs:

BSDs

Linuces

Unices (including AIX, Solaris)

MS Windows

Apple MacOS

I'd say BSDs because there are the most structured and scientific - logical of them all.

BSDs & Linuces are just UNIX by a different name.

(So is 'Apple MacOS' probably!)

 Agree for MacOS, disagree for the rest. They may result to similar OSs from a user's perspective but they are architecturally different. For example BSDs are single-entity OSs while Linuces have the "Linux kernel" which provides the basics (no program comes with the kernel, not even the command line shell) and can have anything on top of that.

I think you'll find that ALL UNIX-based systems (and all modern OS's) are stratified into layers in much the same way ...

I play chess like Windows ME ran.  There's some logic to it, but it's still performs quite poorly.

Chess is open source.