Before You Ask
How do I install Wurst?
Please read our installation tutorial.
I have Minecraft 1.12.2. Why does the Wurst MC 1.12 installer say that it couldn't find my Minecraft installation?
You need Minecraft 1.12, not 1.12.2. Just download 1.12 through the Minecraft launcher and you'll be fine.
Why can't I run the Wurst installer?
Maybe you don't have Java installed (or you have an outdated version). Maybe you have configured your computer to open .JAR files with some other program than Java. Or maybe you are simply using "java.exe" instead of "javaw.exe".
Does Wurst work with Minecraft Forge?
No, but ForgeWurst does.