After you have downloaded the modpack from Modrinth, install OptiFine for Fabric on your platform! While I recommend the Modrinth App for the best experience, you may use any launcher that supports opening .mrpacks.
To install OptiFine for Fabric on the Modrinth App, click the button below. Note: it will not work if you do not have the Modrinth App installed.
Unfortunately, OptiFine for Fabric is not available on Curseforge. This is because Curseforge does not support the file format OptiFine for Fabric uses. I recommend switching to the Modrinth App or Prism Launcher for the best experience.
To install OptiFine for Fabric on the official Minecraft Launcher, please download the installer. It will download and parse the modpack to install on your Minecraft Launcher.
OptiFine for Fabric is compatible on several 3rd party Minecraft launchers. Please refer to their guides for installing modpacks from Modrinth.