Minecraft Launcher
Download the FO Installer
Open the
exeinstaller. If you get a security prompt from Windows, allow the installer to run:Click on More info
Click on Run anyway
Select your desired FO and Minecraft versions
Click on Install
Open the Minecraft Launcher. You should find a new installation
Launch the newly created Fabulously Optimized installation. Minecraft should start up
If you can see
Fabulously Optimizedin the bottom-right corner, you're done!
Why does Windows show the security prompt?
TODO
Download the FO Installer
Open the
appimageinstaller. If you get a security prompt from your OS, click on Run once.Select your desired FO and Minecraft versions
Click on Install
Open the Minecraft Launcher. You should find a new installation
Launch the newly created Fabulously Optimized installation. Minecraft should start up
If you can see
Fabulously Optimizedin the bottom-right corner, you're done!
Download the FO Installer
Open the
dmginstaller. If you get a security prompt from macOS, allow the installer to run:Double-click on the FO Installer. You will get a warning
Click on Done
On the menu bar, click on the Apple logo
Click on System Settings
In the sidebar, click on Privacy & Security
In the right view, scroll down to find a Open anyway button
Click on the Open anyway button
If prompted, authenticate with your password or your fingerprint
Select your desired FO and Minecraft versions
Click on Install
Open the Minecraft Launcher. You should find a new installation
Launch the newly created Fabulously Optimized installation. Minecraft should start up
If you can see
Fabulously Optimizedin the bottom-right corner, you're done!
Why does macOS 15+ show the security prompt?
Apple has implemented a verification system for programs, which costs 99 USD a year. Such an expense is not worth it for FO.
If you are concerned by this, you can also install FO manually, or use another launcher compatible with FO. By the way, FO's installer's source code is available if you want to check it.
Download the FO Installer
Open the
dmginstaller. If you get a security prompt from macOS, allow the installer to run:Right-click on the FO Installer
Click on Open
If a popup prompts again, click on Open
Select your desired FO and Minecraft versions
Click on Install
Open the Minecraft Launcher. You should find a new installation
Launch the newly created Fabulously Optimized installation. Minecraft should start up
If you can see
Fabulously Optimizedin the bottom-right corner, you're done!
Why does macOS 14- show the security prompt?
Apple has implemented a verification system for programs, which costs 99 USD a year. Such an expense is not worth it for FO.
If you are concerned by this, you can also install FO manually, or use another launcher compatible with FO. By the way, FO's installer's source code is available if you want to check it.
On macOS and Linux, download and install Java TODO: what version
Download the Fabric Installer
Open the Fabric Installer
Select
version 0.18.1of the Fabric LoaderClick on Install. You have now installed the Fabric Loader
Open the Minecraft Launcher
Click on Installations. You should find a new Fabric installation
Click on the 📂 Folder button next to the Fabric installation
Open your browser
Open the FO vanilla downloader
If you do not want the latest version, select the version you want from the dropdown
Click on the ⬇️ Download button. A
zipfile should be downloaded. What does thezipfile contain?If you get a prompt about popup windows or multiple downloads, please allow them
Extract the
zipfileOpen the extracted
zipfileCopy all folders from the extracted
zipfile to the.minecraftfolder you opened in step 8. Why do I need to copy everything over?If you're asked to replace files, replace them
If you want the recommended FO settings, delete
options.txt. This will reset your vanilla options (resource packs, language, keybinds...) but you can reapply them laterGo back to the Minecraft Launcher
Launch the Fabric installation from step 7. Minecraft should start up
If you can see
Fabulously Optimizedin the bottom-right corner, you're done!
What does the zip file contain?
zip file contain?The zip file contains the following:
config/: Configuration files to adjust the mods for the best experiencemods/: The mods included in FOresourcepacks/: Small resource packs for the best experience. What do the resource packs do?Copy all 3 folders!: A dummy file reminding you to, well, copy all 3 folders!
Download the Fabric Installer
Open the Fabric Installer
Select the appropriate version of the Fabric Loader:
Minecraft 1.19-1.19.3:
version 0.14.24Minecraft 1.17-1.18.2:
version 0.14.12Minecraft 1.16.5:
version 0.13.3
Click on Install. You have now installed the Fabric Loader
Open the Minecraft Launcher
Click on Installations. You should find a new Fabric installation
Click on the 📂 Folder button next to the Fabric installation
In your browser, open the Files section on CurseForge
Click on the appropriate version of FO
Click on Additional files. You should find a MultiMC version
Click on the three dots, then on Download file. A
zipfile should be downloaded. What does thezipfile contain?Extract the
zipfile. If you see less than 10 mods in it, you have downloaded the wrong versionGo to
Fabulously Optimized *.*.*>minecraft. You should find azipfile in thereExtract the
zipfileCopy all folders from the
zip'sminecraftfolder to the.minecraftfolder you opened in step 6. Why do I need to copy everything over?If you're asked to replace files, replace them
If you want the recommended FO settings, delete
options.txt. This will reset your vanilla options (resource packs, language, keybinds...) but you can reapply them laterGo back to the Minecraft Launcher
Launch the Fabric installation from step 5. Minecraft should start up
If you can see
Fabulously Optimizedin the bottom-right corner, you're done!
What does the MultiMC pack contain?
The MultiMC zip file is a packaged instance for MultiMC, but it was also used for manual installation up to FO 6.0.0. This file was hosted on CurseForge because downloads from there used to support FO with monetary benefits.
It contains the following:
Fabulously Optimized *.*.*/: A folder containing the MultiMC instanceminecraft/: The main folder of FOconfig/: Configuration files to adjust the mods for the best experiencemods/: The mods included in FOresourcepacks/: Small resource packs for the best experience. What do the resource packs do?Copy all 3 folders!: A dummy file reminding you to, well, copy all 3 folders!
instance.cfg: A manifest file describing name, icon, type and notes for the instancemmc-pack.json: A manifest file describing the version of Minecraft, Fabric and of other dependenciespack.png: An icon for the instance
Why do I need to copy everything over?
FO consists of mods, configuration and resource packs, and all three are necessary. What does the pack contain?
Copying the mods folder alone may result in a number of issues:
In some versions the game will not launch at all
Some of your resource packs will be broken
Some features, such as zoom, will not work as shown
New unexpected keybinds will appear
Confusing mod buttons or popups will appear
Confusing descriptions in the mod list
There won't be any FO version number in the title screen
If you have mistakenly forgotten to copy the other folders, do the following:
Follow steps 6-8 from the instructions above to open the installation's folder
Locate and delete the
modsfolderIf you had modified your settings in-game, move both
config/andoptions.txtto a different locationFollow steps 9-17 from the instructions above to copy the missing files over
If you had backed up your settings in step 3 and you don't want the recommended FO settings, move yours back
Follow steps 19-21 from the instructions above to complete the installation
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