Update modrinth_mac.md

Author: Axuras

docs/launcher/modrinth_mac.md

@@ -4,6 +4,6 @@ Modrinth App is an incredibly powerful launcher that makes managing your mods an
 
 This guide will explain the install process for Modrinth, as well as how we can use it for SkyClient. Please take the time after setting up to better learn your way around the launcher, as you may end up using it as your go-to launcher from now on!
 
-## How to Install (MacOS)
+## How to Install (Mac)
 
 * Despite looking long, this is a very simple process and should only take a few minutes! This guide will also assume you are migrating from SkyClient, but steps will be largely the same, except for the migrating data section.