[MCL-25818] MacOS when trying to launch mods with Minecraft using forge, Minecraft launcher gets stuck on "Preparing"

I was trying to launch Minecraft Java 1.20.1 using The CurseForge app as a mod loader and When I clicked Play, it got stuck on preparing.

I tried reinstalling and only worked once or twice then it did it again. Any fixes?

Comments 2

Alexbaron309 2025-09-15T11:59:26Z

Try contact curseforge support for the mod issues, could try to verified by removing the mod and try lauch minecraft if yes, then contact curseforge support for mod issues.

[MOD] Greymagic27 2025-09-15T16:57:30Z

Thank you for your report!
However, this issue is Invalid.

Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please recreate the issue.

Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
A world which had previously been opened with a modified client might be corrupted. Please try reproducing the issue in a newly generated world.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers like Hypixel, please contact them first as they run modified server software.

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