Right-click on the instance you'd like to install mods to and select Edit Instance, or click on it once and select Edit Instance from the menu on the right of the window.To install mods to your MultiMC instance, simply follow these steps: That's all there is to it! Once you've followed these steps, your instance should be ready to go - just add your mods and get playing. Set up the rest of your instance as normal.Select the Quilt Loader version you'd like to use and click OK.Select Version from the list on the left, and click the Install Quilt button in the menu on the right side of the window.Right-click on the instance and select Edit Instance, or click on it once and select Edit Instance from the menu on the right of the window.Click OK to create a new vanilla instance.Select Vanilla from the list on the left, and pick the version of Minecraft you'd like to use for your instance.Fill out the Name and Group boxes as required.Open MultiMC, follow the setup steps and click on the Add Instance button at the top of the window.Download and install MultiMC from their website.

To set up a Quilt instance with MultiMC, follow these steps: MultiMC is a launcher with advanced features to allow power users to manage separate instances of Minecraft.

Multimc forge