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Mainstay SMP ModpackMinecraft modpack for 1.21.11

Modpack for those who want to use all server features

newest supported release 1.21.11AdventureOptimizationLightweightMultiplayer
Latest version
5.0.2
Minecraft
1.21.1 to 1.21.11
Java
Java 21+
Loader
Fabric
Licence
LicenseRef-All-Rights-Reserved
Downloads
2.4k
Updated
7 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Mainstay SMP Modpack servers

One click and Mainstay SMP Modpack is installed with the right loader, on hardware built for it.

  • 1.21.11
  • Fabric
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Mainstay SMP Modpack declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Fabric21+declared9 Dec 2025
1.21.10Fabric21+declared7 Oct 2025
1.21.8Fabric21+declared17 Jul 2025
1.21.7Fabric21+declared30 Jun 2025
1.21.4Fabric21+declared3 Dec 2024
1.21.1Fabric21+declared8 Aug 2024

Download

From Mainstay SMP Modpack’s own host. Nothing is re-hosted here.

Browse 26 indexed releases

Most recently published release

5.0.2release5 Apr 2026

Mainstay Minimal edition 1.21.11 5.0.2.mrpack · 0.3 MB · for 1.21.11 · Fabric

Download this release
b3ebd7f047a9…
Older versions24
  • 5.0.124 Feb 20261.21.110.2 MB20 downloadsfe25180ad275…Get
  • 5.0.05 Feb 20261.21.110.2 MB16 downloads90c974545fbf…Get
  • 4.0.317 Dec 20251.21.100.2 MB35 downloads514101a3f84f…Get
  • 4.0.230 Nov 20251.21.100.2 MB17 downloads986c598c72fb…Get
  • 4.0.122 Nov 20251.21.100.3 MB19 downloadsfb08220a1c70…Get
  • 4.0.022 Nov 20251.21.100.2 MB15 downloads9fe4e8cb3b53…Get
  • 3.1.118 Sept 20251.21.80.2 MB43 downloads9cf1caf12c07…Get
  • 3.1.03 Sept 20251.21.80.2 MB49 downloadsb9672eb9d2e7…Get
  • 3.0.030 Jul 20251.21.70.3 MB42 downloadsd0b0790d55bb…Get
  • 2.0.82 May 20251.21.40.7 MB66 downloads9d6faa5fda9b…Get
  • 2.0.71 May 20251.21.40.7 MB45 downloadsae746862bf54…Get
  • 2.0.623 Feb 20251.21.40.7 MB61 downloads35c40e8a48e6…Get
  • 2.0.58 Feb 20251.21.40.7 MB50 downloads250154ada1e0…Get
  • 2.0.426 Jan 20251.21.40.7 MB58 downloadsc7c30e4799b5…Get
  • 2.0.320 Jan 20251.21.40.5 MB51 downloadsf6d3b770279d…Get
  • 2.0.218 Jan 20251.21.40.5 MB71 downloadsa5ba0ff76193…Get
  • 2.0.118 Jan 20251.21.40.5 MB53 downloadsff1c1199263d…Get
  • 2.0.017 Jan 20251.21.439 KB56 downloads1280139a6afe…Get
  • 1.1.622 Dec 20241.21.112.8 MB108 downloadsc93d64416abd…Get
  • 1.1.53 Dec 20241.21.111.0 MB95 downloads8131d6151f15…Get
  • 1.1.41 Dec 20241.21.111.0 MB62 downloadse9948a4bd547…Get
  • 1.1.21 Dec 20241.21.111.0 MB56 downloads6510cc3d6697…Get
  • 1.1.110 Nov 20241.21.19.0 MB120 downloads7dbfc185df26…Get
  • 1.1.016 Oct 20241.21.18.6 MB179 downloads9baaad131185…Get

Frequently asked

Does Mainstay SMP Modpack work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version Mainstay SMP Modpack declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Mainstay SMP Modpack support?

Everything the author has declared, from 1.21.1 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does Mainstay SMP Modpack support?

Fabric. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Mainstay SMP Modpack?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is Mainstay SMP Modpack under?

LicenseRef-All-Rights-Reserved, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Mainstay SMP Modpack?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download Mainstay SMP Modpack safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

MAX FPS: Optimized🚀 MAX FPS WITHOUT UNNECESSARY MODS! Only 16 optimization mods - NOTHING EXTRA! ✅ ALL MAJOR VERSIONS ⚡ INSTALLS ON ANY LAUNCHER! (Guide below)Simply Optimized ReloadedAn unofficial port of Simply Optimized built to support every major mod loader and stay current with the newest versions of Minecraft.FPS+ PvP Boost | Ultimate FPS & Combat Client [ Every Version ]Ultra-lightweight FPS boost & PvP modpack for Fabric. Boost FPS on low-end PCs with Sodium optimizations, lower input lag, cleaner visuals, and combat HUD tweaks built for Hypixel Bedwars, Duels, PotPvP & CPVP. Maximize frames and dominate fights.ElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 ✔Photon OptimizationMinecraft optimization framework prioritizing performance, simplicity, and compatibility. 1.7.10-26.1.2 across Fabric, Forge, NeoForge, and Quilt!Just Enough OptimizationJust Enough Optimization - Focused on low memory usage and higher avarege fps. Made for low-end pc so everyone can run Minecraft

Details from Modrinth, where the author last updated it on 5 Apr 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .