![]() ![]() It should automatically provide you with the installation location). Install Optifine (double-click Optifine, and click 'install' wherever the official Minecraft was installed to. Well fear not! For I have the miracle solution!!! :D Your lord and saviour is here!! For those, like me, that had issues even with all this help and still couldn't get it to work. IMAGE: It should look somewhat like this: ĮVERYBODY. You need to add it to Minecraft.jar rather then adding it to loader mods. If it works YAY! If not, you may need to start Minecraft for that version of Optifine in the official launcher (just once). You can drag & drop, or use the prompt.ĭownload the appropriate Optifine version at .Īgain, when it has downloaded, double click the Jar or run the jar with Java. When you have the extracted jar, go to MultiMC, go to Loader Mods and add it. When it has downloaded, double click the Jar or run the jar with Java. MultiMC/libraries/org/apache/logging/log4j/log4j-core/2.14.1/log4j-core-2.14.1.For Forge: Download the appropriate Optifine version at. MultiMC/libraries/org/apache/logging/log4j/log4j-core/2.0-beta9-fixed/ MultiMC/libraries/org/apache/logging/log4j/log4j-api/2.0-beta9-fixed/ When starting up an instance, the log4j library versions should be either 2.16.0 or 2.0-beta9-fixed. ![]() If the customized versions came with a modpack and you’re not sure how to proceed, contact the modpack author(s) or look for any instructions they may have published.Ĭheck the logs during start to be absolutely sure. If you actually customized your versions on purpose, you will have to redo that with the updated log4j libraries. If Minecraft, Forge, Liteloader or Fabric have (Custom) in their version like this, select them and press Revert. You may have done this without realizing, so go check: Make sure you haven’t customized Minecraft/Liteloader/Forge/Fabric versions in the instance Version page(s).Ĭustomized versions will not automatically update. MultiMC needs to download new files to actually apply the fixes. Start all your instances in online mode at least once. Restarting it will make it check for updates to all those versions again. While MultiMC is running, it remembers the descriptions of versions it has seen during that session. We cannot vouch for anything that comes from sources other than .įully restart MultiMC to make it load fresh version metadata. ![]() Make sure you are actually running MultiMC and not some third party fork. ![]() While the defaults are safe, there are some things you can do to ensure this is true in your case. Force all mod loaders installed through MultiMC to not bundle any version of log4j.Įffectively, if you use MultiMC and haven’t done anything unusual with it, you should be safe.Force old version of Minecraft to use a patched version of log4j 2.0-beta9, which has this issue fixed.Force all modern versions of Minecraft to use log4j 2.15.0 or newer, which doesn’t have this issue.MultiMC has a system to automatically update game and mod loader versions. NOTE: log4j has been further updated to 2.16.0.ĭo not be alarmed by the change from 2.15.0. Hello, you may have seen all kinds of chaos and misunderstanding related to a security bug in log4j that can allow attackers to run code on your machine.Īll versions of the game that use an unpatched or old version of the log4j library are susceptible to attacks - if you are running a server, or are connecting to one. ![]()
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