TechAether

How to install the modpack and join the server. Minecraft 1.21.1 · NeoForge 21.1.255 · 30 mods.

Two things first, or nothing will work
  1. You need Minecraft: Java Edition. Not Bedrock, not the Microsoft Store edition, not Pocket Edition. If you bought Minecraft on a console or through a phone app store, that is Bedrock and it cannot join this server at all, whatever you install.
  2. You must be whitelisted. Send Jonathan your exact Minecraft username, capitalisation included. Until then you will be kicked with "You are not white-listed on this server".

Server address

mc.jonathan.gluck.dev Multiplayer → Add Server.

PC — Windows, Mac or Linux

The easy route. About ten minutes, mostly waiting on downloads.

Download the modpack 5 KB — .mrpack, imports in one step.

  1. Install Prism Launcher from prismlauncher.org. Free and open source.
  2. Open it and sign in with the Microsoft account that owns Java Edition.
  3. Download the .mrpack above.
  4. Add Instance → Import → choose the .mrpack → OK.
  5. Wait while it fetches Minecraft, NeoForge and about 190.7 MB of mods.
  6. Raise the memory before launching. Right-click the instance → Edit → Settings → Memory → set the maximum to 6144 MB. This matters: the default allocation will stutter or crash with mods this heavy.
  7. Launch. The first start is slow — Create, Mekanism and Applied Energistics all build caches once.
  8. Multiplayer → Add Server → paste the address above → join.

The Modrinth App also imports .mrpack files. The official Minecraft launcher does not — it can't install NeoForge modpacks this way, so don't go down that road.

Android

Honest expectations

This does work, but it is fiddly and slow. Create, Mekanism and Applied Energistics are demanding mods never designed for phones. A mid-range device will struggle; a recent flagship copes. You still need a real Java Edition account and roughly 2 GB free storage.

  1. Install Zalith Launcher 2 (recommended) or FoldCraftLauncher. Both run genuine Java Minecraft on Android, which is what makes joining a NeoForge server possible at all.
  2. Sign in with your Microsoft account.
  3. Try importing the modpack first. Download the .mrpack above and import it as a modpack. Both launchers have Modrinth modpack support, so this may well just work and saves you a lot of fiddling.
  4. If import fails, do it by hand: create a Minecraft 1.21.1 version, install NeoForge 21.1.255 into it (the version must match exactly), then download all 30 mods from the list below and put every .jar in that version's mods folder.
  5. Give the launcher as much RAM as your device allows, then add the server address and join.

If you install by hand, copy in all 30 jars — a partial mod list is the most common reason joining fails. Using a gamepad? Prefer Zalith: on FoldCraftLauncher, controller input in "SDL Direct" mode has been observed causing frame stalls.

Mod list

All 30 mods, straight from Modrinth. There is no single bundled zip on purpose: several of these mods are All Rights Reserved, so handing out a repackaged archive of them isn't ours to do. The .mrpack avoids the problem entirely by listing checksums and letting your launcher fetch each mod from the author's own release.

Show all 30 downloads (190.7 MB total)
ModFileMB
Applied Energistics 2appliedenergistics2-19.2.18.jar7.85
Cloth Configcloth-config-15.0.140-neoforge.jar1.11
Controlifycontrolify-3.0.1+lts+1.21.1-neoforge.jar7.61
Createcreate-1.21.1-6.0.10.jar18.24
Create Crafts & Additionscreateaddition-1.6.0.jar1.58
Create: Steam 'n' Railsrailways-0.2.1+neoforge-mc1.21.1.jar11.56
Deep Aetherdeep_aether-1.21.1-1.1.5.1.jar44.09
FerriteCoreferritecore-7.0.3-neoforge.jar0.12
Functional Storagefunctionalstorage-1.21.1-1.5.7.jar0.74
GuideMEguideme-21.1.19.jar8.88
Immersive EngineeringImmersiveEngineering-1.21.1-12.4.2-194.jar13.57
Industrial Foregoingindustrialforegoing-1.21-3.6.27.jar4.53
JadeJade-1.21.1-NeoForge-15.10.6.jar0.69
Just Enough Items (JEI)jei-1.21.1-neoforge-19.51.0.418.jar1.72
MekanismMekanism-1.21.1-10.7.19.85.jar11.42
Mekanism: AdditionsMekanismAdditions-1.21.1-10.7.19.85.jar1.11
Mekanism: GeneratorsMekanismGenerators-1.21.1-10.7.19.85.jar1.06
Mekanism: ToolsMekanismTools-1.21.1-10.7.19.85.jar0.5
ModernFixmodernfix-neoforge-5.27.24+mc1.21.1.jar0.58
owo-libowo-lib-neoforge-0.12.15.5-beta.1+1.21.jar1.16
Powah!Powah-6.2.10.jar2.61
Sophisticated Backpackssophisticatedbackpacks-1.21.1-3.26.7.2182.jar1.18
Sophisticated Coresophisticatedcore-1.21.1-1.5.5.2363.jar1.73
sparkspark-1.10.124-neoforge.jar3.47
TerraBlenderTerraBlender-neoforge-1.21.1-4.1.0.8.jar0.11
The Aetheraether-1.21.1-1.5.10-neoforge.jar38.36
Titaniumtitanium-1.21-4.0.50.jar0.58
Xaero's Minimapxaerominimap-neoforge-1.21.1-26.6.0.jar2.09
Xaero's World Mapxaeroworldmap-neoforge-1.21.1-1.47.0.jar1.36
YACLyet_another_config_lib_v3-3.8.2+1.21.1-neoforge.jar1.07

What's in it

CategoryMods
TechMekanism (+ Generators, Tools, Additions), Create (+ Crafts & Additions, Steam 'n' Rails), Applied Energistics 2, Immersive Engineering, Industrial Foregoing, Powah
ExplorationThe Aether, Deep Aether
StorageFunctional Storage, Sophisticated Backpacks
Quality of lifeJEI (recipes), Jade (block tooltips), Xaero's Minimap & World Map
PerformanceModernFix, FerriteCore, spark
ControllersControlify — only relevant if you play on a gamepad

Press E and the JEI panel appears on the right. Type an item name to see how to craft it — by far the fastest way to get your bearings in a pack this size.

If it doesn't work

"You are not white-listed on this server"

Expected until Jonathan adds you. Send him your exact username.

"Failed to authenticate your connection", or you can't sign in at all

Nearly always a Bedrock account rather than Java Edition. Check on minecraft.net that your account owns Java Edition.

A long red list of mods when you try to connect

Your mod list doesn't match the server's. Don't fix it mod by mod — delete the instance and re-import the .mrpack cleanly. If you installed by hand, check that all 30 jars are present and none are duplicated.

Crashes on startup or when loading the world

Usually memory. Set the instance maximum to 6144 MB. If it continues, send Jonathan the crash report — Prism offers it to you directly.

"Connection refused", "Connection timed out", or it shows as offline

Nothing you can fix from your end — the server probably isn't running. Ask Jonathan to start it.

Connects, then drops you after a few seconds

More often memory on your machine than the network. Try the memory step first.