For 1.20.1, Lunar often defaults to Sodium (instead of OptiFine) because it provides superior performance on modern Minecraft versions.
1.20.1 is more resource-heavy than 1.8.9. Go to the Lunar Launcher settings and ensure you have at least 3GB to 4GB of RAM allocated.
Unlike the old days of Minecraft where you had to hunt for specific JAR files in deep folders, Lunar Client uses a unified launcher system. Here is how you ensure you are using the correct 1.20.1 files: lunar client jar 1201
If your 1.20.1 version isn't launching or the JAR seems corrupted, try these quick fixes:
Access to armor trim previews, waypoint systems, and keystrokes mods that are essential for both PvP and Survival play. How to Access the 1.20.1 Version Unlike the old days of Minecraft where you
You can hide the new 1.20 buttons or rearrange your HUD to keep the screen clear while exploring.
The launcher will automatically download the necessary JAR files and libraries into your .lunarclient directory. Locating the JAR Files (Advanced Users) The launcher will automatically download the necessary JAR
Always get the installer from the official Lunar Client website . Avoid third-party sites claiming to host a standalone "1.20.1 JAR," as these are often outdated or contain malware.
If you are a developer or a power user looking for the actual JAR files (for instance, to allocate more RAM via a script or to inspect the build), you can usually find them here: %userprofile%\.lunarclient\offline\multiver\ Mac/Linux: ~/.lunarclient/offline/multiver/
Are you looking to use with 1.20.1, or are you more focused on getting the highest FPS possible?