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modpack

MCC Island OptimisedMinecraft modpack for 1.21.11

This is an unofficial Modpack that optimizes your game and adds QoL features to your game including MCCI. Lunar Client Recommended (to use Lunar's optimisations as well)!

client onlynewest supported 1.21.11TechnologyAdventureOptimizationChallenging
Latest version
v2.3
Minecraft
1.19.4 to 1.21.11
Java
Java 21+
Loader
Fabric
Licence
LicenseRef-All-Rights-Reserved
Downloads
11.4k
Updated
23 d ago
Available on
Modrinth

Screenshots

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

Minecraft versions

Every version MCC Island Optimised declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Fabric21+declared9 Dec 2025
1.21.8Fabric21+declared17 Jul 2025
1.21.5Fabric21+declared25 Mar 2025
1.21.4Fabric21+declared3 Dec 2024
1.21.3Fabric21+declared23 Oct 2024
1.21.1Fabric21+declared8 Aug 2024
1.21Fabric21+declared13 Jun 2024
1.20.6Fabric21+declared29 Apr 2024
1.20.4Fabric17+declared7 Dec 2023
1.20.2Fabric17+declared20 Sept 2023
1.20.1Fabric17+declared12 Jun 2023
1.20Fabric17+declared2 Jun 2023
1.19.4Fabric17+declared14 Mar 2023

Download

From MCC Island Optimised’s own host. Nothing is re-hosted here.

v2.3release13 Mar 2026

MCC Island Optimised 1.21.11 V2.3.mrpack · 80.9 MB · for 1.21.11

Download latest
e9a72b3b61e0…
Older versions21
  • v2.210 Aug 20251.21.844.7 MB1.9k downloads23795efedbfc…Get
  • v2.2-Lunar_Client10 Aug 20251.21.846.6 MB126 downloads320dc981a809…Get
  • v2.116 Jun 20251.21.537.9 MB649 downloads6584119d2cca…Get
  • v2.1-Lunar_Client16 Jun 20251.21.537.9 MB102 downloads9698daa860c5…Get
  • v2.014 Apr 20251.21.436.5 MB755 downloads8dcc112e8456…Get
  • v2.0-Lunar_Client14 Apr 20251.21.436.2 MB137 downloads0715afb7168a…Get
  • v1.926 Dec 20241.21.336.5 MB572 downloads9e15cb242e75…Get
  • v1.9-Lunar_Client26 Dec 20241.21.336.2 MB126 downloads2ceec8dd3ed6…Get
  • v1.824 Oct 20241.21.147.8 MB682 downloads51ab7f25059a…Get
  • v1.8-Lunar_Client24 Oct 20241.21.118.0 MB159 downloads88e009028f2f…Get
  • v1.722 Aug 20241.210.0 MB488 downloads9c74be362fde…Get
  • 1.6.125 May 20241.20.60.0 MB589 downloads7a73e88231b1…Get
  • 1.5.125 May 20241.20.40.0 MB364 downloadse2604ce79073…Get
  • 1.625 May 20241.20.60.0 MB116 downloadsbf22aac2200c…Get
  • 1.525 May 20241.20.40.0 MB105 downloads3968dfa8669b…Get
  • 1.43 Oct 20231.20.20.0 MB801 downloads3f3356f67a60…Get
  • 1.33 Oct 20231.20.10.0 MB697 downloads5524d47921b8…Get
  • 1.2.13 Oct 20231.20.1138 downloads
  • 1.218 Sept 20231.20.10.0 MB181 downloads282514be911f…Get
  • 1.127 Jun 20231.20, 1.20.10.0 MB366 downloads4256741bb408…Get
  • 1.011 Apr 20231.19.40.0 MB307 downloads9f4dadfc1c43…Get

Frequently asked

Does MCC Island Optimised work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version MCC Island Optimised 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 MCC Island Optimised support?

Everything the author has declared, from 1.19.4 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install MCC Island Optimised on the client or the server?

The client only. There is nothing to install on the server side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

Which platform or loader does MCC Island Optimised 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 MCC Island Optimised?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the modpack itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is MCC Island Optimised 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 MCC Island Optimised?

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 MCC Island Optimised 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. The download link goes to the source recorded for that release; verify the publisher, filename and 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)PacktrixPre-packed Official Modpack containing Patrix Resource Pack for easy install using Fabric/Quilt.Simply Optimized ReloadedAn unofficial port of Simply Optimized built to support every major mod loader and stay current with the newest versions of Minecraft.ElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 rc1 ✔fps+pvpFPS + PvP Boost is a lightweight Minecraft modpack designed to maximize performance and give players a competitive edge in PvP. With FPS-boosting optimizations and combat-focused tweaks, it delivers smoother gameplay, better responsiveness, and enhanced viOptimized MaximaThis modpack made for optimization vanilla and fix many bugs. Based on Vanilla Extension modpack, but without decorations stuff.

Last checked 22 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

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