Ensure you have played Minecraft 1.19.x once without mods first. Run the OptiFine .jar file and click Install .
Run the .jar installer you downloaded. Select version 1.19.x , choose the "Iris + Sodium" install type, and click Install . [1.19.x] Download Arc Shader Pack
Offers much better FPS on modern versions like 1.19. Download from the Iris Shaders website . Ensure you have played Minecraft 1
The classic choice. Download the 1.19.x version from the official OptiFine site . 2. Install the Loader [1.19.x] Download Arc Shader Pack