Includes built-in support for OptiFine (OF), which can be added manually to the mods folder or is sometimes bundled in the installer depending on the specific "OF" edition. Installation Steps
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 Download Wurst v6.35 MC1.12 OF
If your version did not come with OptiFine bundled, download the 1.12.2 version of OptiFine and place it in the .minecraft/libraries or mods folder created by Wurst. Safety Warning Includes built-in support for OptiFine (OF), which can
Only download Minecraft clients from official sources like WurstClient.net. Downloading from third-party "re-upload" sites or YouTube description links can expose your computer to malware or account theft. How to Install Minecraft Hacked Client for 1.12.2 - Wurst Safety Warning Only download Minecraft clients from official
Get the .jar file for v6.35 from the link above.
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.