NOTE: this install is for version 1.20.4 – Old versions here. With the conclusion of WHIMC will hold steady at this version from here on out.
1. First, ensure you have the a version of Java JDK 17 installed:

2. Next, download MultiMC for free online:

3. Permit MultiMC
Now, go ahead and launch MultiMC, if you may get a warning – make sure to permit it:
4. After this you’ll need to add the WHIMC instance, add it like this:
Small QRF Instructor (teacher) instance (194mb):
https://uofi.box.com/shared/static/z2tmkx20c5q7sih7zig3jjb4v4bzfav9.zip
QRF Instructor (teacher) instance (1.4gb):
https://uofi.box.com/shared/static/oy50tzbazehcjwhmgif1iqmociqh5580.zip
QRF Participant instance (includes single player maps and new map plugin – 1.4gb):
https://uofi.box.com/shared/static/z0g6xybk0gmqwxswfh1xhhv68k2jd47j.zip
Dome Theater instance (Celestial Bodies + configured shaders and mods – 2gb):
https://uofi.box.com/shared/static/ovtcasnxaln1ewn6sezedl36tozjgg9q.zip

5. Finally, login with your Minecraft Java Edition account:
6. Launch the instance, you’re ready to play!
Look for the BLUE PLAY BUTTON – if it’s there it’s going just wait a second.
Common Problems
If it fails to launch most of the time it’s because Java isn’t associated correctly. Right-click on the instance and go to “edit instance” and go to the settings option and “auto-detect” Java to pick a version 17 one.


If it still doesn’t launch it might be because of graphics drivers or hardware. You can try to update those or try another computer.