Make readme more generic regarding Macs

readme.md

@@ -71,10 +71,10 @@ OpenRCT2 requires original files of Rollercoaster Tycoon 2 to play. It can be bo
 - Visual Studio 2015 Update 2 (Enterprise / Professional / [Community (Free)](https://www.visualstudio.com/products/visual-studio-community-vs))
 - [Powershell 4.0](http://social.technet.microsoft.com/wiki/contents/articles/21016.how-to-install-windows-powershell-4-0.aspx).
 
-### Mac OS X:
+### Mac:
 - [Homebrew](http://brew.sh)
 
-### Mac OS X / Linux:
+### Mac / Linux:
 - sdl2
 - sdl2-ttf
 - speexdsp
@@ -95,8 +95,8 @@ All libs listed here (bar cmake) required in 32 bit variants.
 
 These PowerShell scripts are stored in ```.\scripts\ps``` and have parameters. Once you have use the build script once, further development can be done within Visual Studio by opening ```openrct2.sln```. The build scripts have several commands allowing you to rebuild certain components such ```g2.dat``` or language files.
 
-### Mac OS X:
-We support native builds OS X (limited to i386 only for now).
+### Mac:
+We support native builds on macOS (limited to i386 only for now).
 Make sure that you have [Homebrew](http://brew.sh/) installed and than run the following commands to install all the needed libraries and build OpenRCT2.
 ```
 # Install libraries