Direct answer
No macOS version is officially confirmed. Current NEKCOM and Steam listings name PC and PlayStation 5, while the Steam system requirements specifically name Windows 10 64-bit.
What official sources confirm
No Mac platform badge or macOS requirements appear on the current official listings.
How to read the available evidence
“PC” on a promotional page does not automatically mean Windows, macOS, and Linux. The platform-specific evidence here is the Steam requirements table, which currently provides Windows hardware and software requirements only. Compatibility layers, virtualization, and cloud services are not substitutes for an announced native version and have not been tested by this site.
The game has not launched. Trailers and developer interviews establish direction, but they do not guarantee final numbers, controls, optimal strategies, or content structure. This guide gives current NEKCOM and Steam pages priority; older announcements remain historical evidence and yield when newer first-party listings conflict.
How the sources were weighed
This page ranks evidence by how directly it supports the search question. Developer and official game pages establish the setting, platforms, and announcements. Steam establishes current PC store status and listed requirements. Community directories can show that a destination exists, but they do not replace a first-party statement.
NEKCOM — Showa American Story: First-party material used for the claim it directly names; pre-release details can still change.
Steam — Showa American Story: Current store record used for availability, platforms, and specifications; it is not proof of unannounced features.
Still pending
Native Apple Silicon or Intel Mac version, compatibility-layer behavior, cloud availability, and any future platform announcement.
Pending details are not filled with guesses. They will be updated only when a traceable official source appears.