Harold SMP Season 4 Modpack

Name: Harold SMP Season 4 Modpack
Price: 12 EUR
Author: Unknown

The official Harold SMP modpack for Season 4 of the server.

by Unknown

102 Downloads

0 Followers

neoforgeMC 1.21.1adventuremagicmultiplayer

Rent Harold SMP Season 4 Modpack Server

Screenshots

About this Modpack

The Harold SMP modpack is the official modpack for S3 and now S4 Harold SMP!

(please note only S4 has an official server.)

CHECK OUT HAROLD SMP HERE!

The modpack comes with many optimization mods as well as simple voice chat zoomify, and more!

It includes:

Many optimization mods like:

    1. Sodium, 
    2. Lithium, 
    3. Dynamic FPS, 
    4. And more!

A few quality of life mods:

    1. Simple voice chat, 
    2. Appleskin, 
    3. JEI,
    4. And more! (again.)

Create + addons:

    1. Create,
    2. Create: Aeronautics,
    3. Create: Copycats+,
    4. Create: Connected,
    5. And more! (Third time's the charm, right?)

And many, many more!

Harold SMP is no longer available to completely vanilla clients as of S4, this modpack is required to use when playing on the server.

The modpack will be updated as the seasons of Harold SMP change.

Available Versions

Harold SMP Season 4 Modpack 1.1.0release

MC 1.21.1neoforge39 downloads

May 23, 2026

How to Set Up a Harold SMP Season 4 Modpack Server

Order Server

Choose at least 6 GB RAM (8 GB recommended for Harold SMP Season 4 Modpack). Based on player count: per 5 players.

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Harold SMP Season 4 Modpack" and click "Install". The neoforge loader and Minecraft 1.21.1 are configured automatically.

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

Harold SMP Season 4 Modpack server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong neoforge loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 8 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a Harold SMP Season 4 Modpack server really need?

Minimum 6 GB, recommended 8 GB for stable performance. per 5 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €12/month).

Can I add custom mods to Harold SMP Season 4 Modpack without conflicts?

Yes, but check compatibility: only use mods for the same loader (neoforge) and same Minecraft version (1.21.1). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

Harold SMP Season 4 Modpack server lagging – performance tips

1) Increase RAM to 8 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.