1.8.9 How to add version 1.8.9

[TMK]

Here, I don't have the version 1.8.9, the oldest version here is 1.16.5.

I need help setting up 1.8.9 minecraft version for creating mods in IntelliJ IDEA.

[_willomit_]

same

[Paint_Ninja]

The mod dev plugin for intellij is unofficial. The forge templates it spits out are sadly often incomplete, outdated or broken.

To start making a forge mod, we recommend using the latest MDK from the files site for the version of MC you want to mod. You extract that zip and open it in IntelliJ.

1.8.9 is extremely old. New IDEs won't work with it - you need a similarly old IDE. If you're modding 1.8.9 purely because you want legacy spam click combat, consider the SpammyCombat mod for modern MC and mod modern MC instead.