Meteor Client does not support OptiFine. Instead, it is designed to work with modern performance mods like Sodium and Lithium. Key Features & Modules

Meteor Client spans across major Minecraft releases, though you must use the specific .jar file corresponding to your game version from the Meteor Archive :

“You’ve gone too far,” he said.

Meteor Client is packed with over 100 modules designed to enhance combat, movement, rendering, and world interaction.

Still widely used on "Legacy Anarchy" servers where 1.16.5 remains the primary version due to its specific combat and movement physics.