You can find the specific archive for the 1.12.2 version on the official Wurst Client Download Page. Wurst v6.35 Minecraft Version: 1.12.2
Ensure you have run this version at least once in your Minecraft Launcher. Download Wurst v6.35 MC1.12 OF
Most Wurst versions for 1.12.2 use a standalone installer. Open the downloaded file and follow the prompts to create a new profile in your launcher. You can find the specific archive for the 1
Get the .jar file for v6.35 from the link above. Download Wurst v6.35 MC1.12 OF
To download (with OptiFine compatibility), you should use the official Wurst Client website to ensure you are getting a safe and authentic version. Official Download Link