A developer working on this Source Engine powered title, which has been in development for nearly one decade, has confirmed that a Linux port is being pursued.
Responding to a SteamCommunity.com thread about Black Mesa for OS X, a developer responded, "We're working on Ports to Mac and Linux, but these things take time as each OS is a different environment and the game runs differently! There's different bugs for each one that'll we'll have to sort out, etc. Don't worry, we are working on it, but no timeline yet."
Black Mesa entered early access on Steam last year with the game still being under development. If you are not familiar with this high quality Half-Life remake, find out more via the Steam listing and BlackMesaSource.com.