If you have never installed Fabric mods before, create a new folder named mods (case-sensitive). Ensure the folder is inside .minecraft .
No, modifying the Minecraft client is not illegal under Mojang’s EULA as long as you don’t distribute decompiled code of the base game (which Meteor does not do). However, using it to gain unfair advantage on public servers often violates that server’s rules, leading to a ban. file name meteorclientmodfabric121jar new