MultiMC

Do NOT disable "API" or "library" mods, because the other mods need them.

Instructions vary depending on whether you had installed FO on MultiMC with the easier installation or with automatic updates.

Windows

Tutorial by Ultrasonic1209 based on Remty5's workaround.

1. Open MultiMC

2. Right-click the FO instance

3. Click on the Instance Folder button

4. While holding Shift, right-click inside of the folder

5. Click on Open in Terminal or Open with PowerShell or similar

6. Run the following commands to download the scripts that will disable the mods:

   (Invoke-WebRequest -Uri "https://raw.githubusercontent.com/Fabulously-Optimized/fabulously-optimized/main/Packwiz/pre-launch.ps1" -OutFile "pre-launch.ps1")
   (Invoke-WebRequest -Uri "https://raw.githubusercontent.com/Fabulously-Optimized/fabulously-optimized/main/Packwiz/post-exit.ps1" -OutFile "post-exit.ps1")

   This should download two files: pre-launch.ps1 and post-exit.ps1

7. Open pre-launch.ps1 in a text editor. You should find a list of mods starting on line 4

8. Copy the name of the mod you want to disable

9. Paste the name of the mod in the line you found in step 7

10. Disable more mods by adding them under line 4 with the same format

11. Go back to MultiMC

12. Click on the FO instance

13. Click on Edit Instance

14. Replace the pre-launch command with the following:

powershell -ExecutionPolicy Bypass -File ..\pre-launch.ps1

1. Replace the post-exit command with the following:

powershell -ExecutionPolicy Bypass -File ..\pre-launch.ps1

Linux and macOS

Tutorial by RaptaG based on Remty5's workaround.

Not fully tested on macOS!

1. Open MultiMC

2. Right-click the FO instance

3. Click on the Instance Folder button

4. Right-click inside of the folder

5. Click on Open in Terminal

   • On macOS follow instructions to get the Terminal there
6. Install jq, which will automatically adapt the script to your Minecraft version
7. Run the following commands to download the scripts that will disable the mods:

   curl -Os 'https://raw.githubusercontent.com/Fabulously-Optimized/fabulously-optimized/main/Packwiz/pre-launch.sh' | curl -Os 'https://raw.githubusercontent.com/Fabulously-Optimized/fabulously-optimized/main/Packwiz/post-exit.sh' && chmod +x pre-launch.sh post-exit.sh

   This should download two files: pre-launch.ps1 and post-exit.ps1

8. Open pre-launch.ps1 in a text editor. You should find a list of mods starting on line 6

9. Copy the name of the mod you want to disable

10. Paste the name of the mod in the line you found in step 8

11. Disable more mods by adding them under line 6 with the same format

12. If you leave a line empty, delete the corresponding one starting on line 28

13. If you need to disable more than 6 mods, add lines both under mod5= and $mod5.jar\

14. Go back to MultiMC

15. Click on the FO instance

16. Click on Edit Instance

17. Replace the pre-launch command with the following:

../pre-launch.ps1

1. Replace the post-exit command with the following:

../pre-launch.ps1

1. Open MultiMC

2. Select the FO instance

3. Click on the Edit Instance button

4. Click on Loader mods

5. Find the mod you want to disable

6. Uncheck the checkbox

7. If you want to re-enable the mod, check the checkbox again