I have OSX Standalone installed but doesnt work onLinux

I have OSX Standalone installed in Linux Unity 2019.2.6f1. It shows in the hub display. But the Build Settings doesn't have a selection for it and I get this error when trying to build a bundle for it. Is there something I am missing?

Building an AssetBundle for target 'MacStandaloneSupport' is not allowed because the required module is not installed. UnityEditor.BuildPipeline:BuildAssetBundles(String, AssetBundleBuild[], BuildAssetBundleOptions, BuildTarget) TilesetEditor:BuildBundle(TilesetAsset) (at Assets/Scripts/Editor/TilesetEditor.cs:340) TilesetEditor:OnGUI() (at Assets/Scripts/Editor/TilesetEditor.cs:169) UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)