Download older version of Minecraft OptiFine mod

Players load hundreds of chunks as they explore a single world, which puts pressure on the device running the game.

This is where OptiFine comes into play, as it completely changes how the game renders chunks and graphics. 

You must first install the vanilla version of Minecraft and manually start it. 

Next, you need to head over to OptiFine's official website

This is where every mod version will be available for download. Simply search for 'OptiFine' and go to the website.

Once you find the desired mod for a particular game version, you can simply click the 'Download' button to save the mod file to your device.

Finally, head to the official game launcher once again and find the modded game version from the version list.