How can i upgrade a 1.17.x Mod to 1.18.x ?

Started by denotzgii on

Topic category: Help with Minecraft modding (Java Edition)

Joined Feb 2022
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How can i upgrade a 1.17.x Mod to 1.18.x ?

Hello dear forum ^^

Can you update a mod created with the 2021.3 (1.17.x) version to 1.18? if so, how do you do that?
I see a lot of Mods on Curseforge made with MCreator and they're running on 1.18

My mod just adds a few mobs, nothing complicated with biomes or anything.

This is my first post so please be kind with me^^

Thank you.

Joined Mar 2020
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Mcreator does not support 1…
Tue, 02/01/2022 - 21:56

Mcreator does not support 1.18.x yet. There should be a "Progress of development" bar on the website that will tell you how close 1.18.x (or another version) is to being supported. I don't know of any way to upgrade Mcreator to 1.18.x using some coding and modifing it, so if someone who knows how to can post so, that will be appreciated.
Have fun modding!

Joined Mar 2021
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You can't yet. 1.18.x update…
Wed, 02/02/2022 - 13:19

You can't yet. 1.18.x update for mcreator is coming soon

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You use a bit of custom code…
Mon, 02/28/2022 - 00:04

You use a bit of custom code..
idk how you do it though.

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Wait...
Mon, 02/28/2022 - 01:45

Wait...

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You absolutely can, but it's…
Thu, 04/21/2022 - 20:06

You absolutely can, but it's a process.

requirements: turn on file name extensions in windows

After downloading your mod, look for the mod file. Right-click and press 'rename'. Change the .jar to .zip and press enter.
This will pop up a warning, saying if you change the file extension, the file may become unusable. Ignore this.

Next, double-click the file and find the pack.mcmeta file. Double click it. In the odd case that it doesn't open up to notepad, right-click it and press 'open with...' and select notepad. This will open up the file. Under where it says 'pack format' just change the 7 to 8. Save the file and exit.

Now exit back to the original download folder. Find the .zip file, press 'rename', and change it back to '.jar'. It should now be usable in 1.18.x.

Joined May 2021
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@GameSlayer27072 - Your post…
Thu, 04/21/2022 - 21:20

@GameSlayer27072 - Your post will work for some datapacks and/or resource packs (conditioned on the changes in commands, if any). A mod requires more than that.

For upgrading a mod from 1.17.x to 1.18.2, you will need to download the latest snapshot MCreator EAP 2022.1 b15515

https://mcreator.net/download/snapshots

Open your 1.17.x workspace in MCreator EAP 2022.1 b15515 and upgrade it to 1.18.2. Keep in mind ... it is a snapshot.