# Minecraft Launcher

{% tabs %}
{% tab title="Installer" %}
{% tabs %}
{% tab title="Windows" %}

1. Download [Fabulously Optimized Installer](https://download.fo/vanilla)
   * If you already have the installer, launch it and skip to step 3.
2. Open the .exe file, click `More info` and then `Run anyway`.
3. Select preferred modpack version and install
4. Run Minecraft Launcher. You'll see the new installation, click PLAY.
   {% endtab %}

{% tab title="macOS 15 and later" %}

1. Download [Fabulously Optimized Installer](https://download.fo/vanilla)
   * If you already have the installer, launch it and skip to step 7.
2. Open the downloaded .dmg file
3. Double-click the "Fabulously Optimized Installer". You will get a warning, press `Done`.
4. On your menubar, press Apple logo, then `System Settings`, then click `Privacy & Security` in the sidebar
5. Scroll down on the right view, you should see the button `Open anyway`
6. Enter your password or fingerprint. The installer should open.
7. Select preferred modpack version and install
8. Run Minecraft Launcher. You'll see the new installation, click PLAY.
   {% endtab %}

{% tab title="macOS 14 and older" %}

1. Download [Fabulously Optimized Installer](https://download.fo/vanilla)
   * If you already have the installer, launch it and skip to step 5.
2. Open the downloaded .dmg file
3. Right click the "Fabulously Optimized Installer" and click `Open`
4. Click `Open` again when asked in a prompt. The installer should open.
5. Select preferred modpack version and install
6. Run Minecraft Launcher. You'll see the new installation, click PLAY.
   {% endtab %}

{% tab title="Linux" %}

1. Download [Fabulously Optimized Installer](https://download.fo/vanilla)
   * If you already have the installer, launch it and skip to step 3.
2. Open the .appimage file and click `Run once` when prompted.
   * If it doesn't open directly, right click, find `Properties` and add a checkmark to an option `Allow executing this file`
3. Select preferred modpack version and install
4. Run Minecraft Launcher. You'll see the new installation, click PLAY.
   {% endtab %}
   {% endtabs %}

{% hint style="info" %}
You may now see a new file *paigaldaja\_meta.json* next to the installer. This is a configuration file that ensures smoother upgrades and remembers some of your install settings.
{% endhint %}
{% endtab %}

{% tab title="Manual install" %}
{% tabs %}
{% tab title="Modern versions" %}

1. Download and install [Fabric Loader](https://fabricmc.net/use/) **version 0.19.2**
   * Remember that the *installer version* doesn't matter, what matters is the *loader version* that appears when you run the installer.
2. Open Minecraft Launcher, click `Installations`, then click 📂 on the Fabric installation
3. [Open this site](https://download.fo/vanilla), then click the ⬇️ button
   * Optional: Select the version you want by selecting it on the dropdown before you click ⬇️.
   * If you got a prompt for popup windows or multiple downloads, please accept it - technical limitation.
4. Open the zip file and copy **all folders** to your *.minecraft* folder
   * If asked - replace the files.
5. Launch the installed Fabric profile
6. If you now see "Fabulously Optimized" in the right bottom corner, you're done!
   {% endtab %}

{% tab title="FO 4.6.1 (MC 1.19.3) and older" %}

1. Download and install [Fabric Loader](https://fabricmc.net/use/) and Java:

{% tabs %}
{% tab title="Minecraft 1.19-1.19.3" %}
Fabric Loader **0.14.24** and [Java 17](https://download.fo/java17)
{% endtab %}

{% tab title="Minecraft 1.17-1.18.2" %}
Fabric Loader **0.14.12** and [Java 17](https://download.fo/java17)
{% endtab %}

{% tab title="Minecraft 1.16.5" %}
Fabric Loader **0.13.3** and [Java 8](https://download.fo/java8)
{% endtab %}
{% endtabs %}

* Remember that the *installer version* doesn't matter, what matters is the *loader version* that appears when you run the installer.

2. Open Minecraft Launcher, click `Installations`, then click 📂 on the Fabric installation
3. Go to [Files](https://www.curseforge.com/minecraft/modpacks/fabulously-optimized/files?showAlphaFiles=show) on CurseForge
4. Click the version you need, then click "Additional files"
5. Click `⋮` → `Download file` on the latest **MultiMC version**
   * If you see less than 10 mods in the zip, you downloaded the wrong version.
6. Open the zip file, go to *Fabulously Optimized x.x.x* > *minecraft*
7. Open the zip file and copy **all folders** from zip's *minecraft* folder to your *.minecraft* folder
   * If asked - replace the files.
8. Launch the installed Fabric profile
9. If you now see "Fabulously Optimized" in the right bottom corner, you're done!
   {% endtab %}
   {% endtabs %}
   {% endtab %}
   {% endtabs %}

{% hint style="warning" %}
Never downgrade to an older version, this could corrupt your worlds and settings!

Never update to an alpha or beta from a release version, [install a separate instance](https://help.minecraft.net/hc/en-us/articles/23431114561037-Create-a-New-Minecraft-Java-Installation-to-Troubleshoot-Launcher-Crashes) for testing.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://wiki.download.fo/update-instructions/minecraft-launcher.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.