There’s no Mac version of Counter-Strike 2 because there are no Mac players
To the surprise of absolutely nobody, Apple's macOS gaming policy of only offering a proprietary, Apple-only API isn't exactly paying off. One of the most popular online games in history, CS:GO, is removing support for macOS, and it won't be coming back. From here on out, the game will only be available on 64-bit Windows and Linux.
That cycle played out again in Valve's recent Counter-Strike 2 update, which removed the Mac support already present in the outgoing Counter-Strike: Global Offensive. Today, a Valve support document for CS2 confirmed that Mac support had been removed and wasn't likely to be re-added, along with support for ancient DirectX 9-class GPU hardware and legacy 32-bit operating systems.
Fret not, though, Mac gamers - there's always Super Tux Kart.