With all the mods that have been released for Minecraft, it can be difficult to keep track of which ones you have installed. To make matters even more complicated, some of the best mods don’t work with one another. Since you only have one .minecraft folder on your computer, switching mods in and out of that folder can be annoying.
With MultiMC, all of those problems disappear. MultiMC 1.6 allows you to have multiple Minecraft installations on your computer at any one time. That means multiple .minecraft folders that each have their own texture packs, mods, saves, and other important information.
What can I do with MultiMC for Minecraft 1.7.3/1.7.2?
The main users of MultiMC are those in the modding community. If you love having multiple mods installed, but don’t want to worry about wrecking your save files and losing other important data, then MultiMC is a perfect mod for you.
MultiMC gives you as many Minecraft installations as you want. Use that to your advantage. Whether you want to use total conversion mods like EvilMinecraft or you just want to try out new mods without risking damage to your favorite save files, MultiMC is a valuable mod to have on your computer.
Another advantage of using MultiMC is the ability to install or uninstall mods without touching WinRAR or 7zip. This helps you save time during the installation process.
With MultiMC 1.6, you also get enhanced crash support. Instead of helplessly watching Minecraft crash to desktop or freeze, MultiMC will attempt to recognize the error message. If the error message is recognized, MultiMC will explain what happened and then tell you how to fix the problem.
How to Install MultiMC for Minecraft 1.7.3/1.7.2
1) Download MultiMC 4.3 here
2) Create a folder for MultiMC and place the downloaded file inside that folder