[TUTORIAL] 3DS: install Luma3DS with MSET9 (firmware 11.4 to 11.17)

Step-by-step DS, DSi and 3DS tutorials: install Luma3DS with MSET9, the Homebrew Launcher, flashcarts and back up your console.
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[TUTORIAL] 3DS: install Luma3DS with MSET9 (firmware 11.4 to 11.17)

Post by Tgames »

Automatically translated from French.

[TUTO] 3DS : installer Luma3DS avec MSET9 (firmware 11.4 à 11.17)

MSET9 is the universal method for installing the custom firmware Luma3DS on all 3DS, 2DS, New 3DS and New 2DS XL consoles, from version 11.4 to 11.17 (the latest), all regions, with no extra hardware needed. Current versions: MSET9 v2.2 (September 3, 2026) and Luma3DS v13.4 (April 2, 2026).


What you need
  • The console's SD card and a card reader on a PC (Windows, macOS, Linux or SteamOS). An Android app and an iOS version also exist.
  • Python installed from python.org (the Microsoft Store version is not supported).
  • The MSET9 zip from its official GitHub page.

Steps
  1. Check that the console doesn't already have a CFW: boot it while holding Select (no menu should appear).
  2. Copy the contents of the MSET9 zip to the root of the card, run the script and choose to create the hacked ID1. Your data will seem to disappear: this is normal and temporary.
  3. On the console, open Mii Maker, then go to Settings > Data Management > Nintendo 3DS > Software > Reset (nothing is erased).
  4. Rerun the script: it should show the status Ready.
  5. Go to Settings > Data Management > Extra Data and remove the SD card with the console powered on, without touching anything else.
  6. On the PC, inject the trigger (option 3), then put the card back in: SafeB9SInstaller starts.
  7. Enter the button combination shown to install boot9strap, then configure Luma3DS.
  8. Required: rerun the script to remove the trigger, then MSET9 (options 4 and 5).
  9. Finish with the guide's "Finalizing setup" page: NAND backup with GodMode9 and installing essential apps.

⚠ Warning: follow every step exactly. If you get a red screen or a freeze, check the guide's MSET9 troubleshooting page before starting over.


Sources and official guides: 3DS Guide · MSET9 · Luma3DS

Tgames provides no games, BIOS, or keys: only use backups of your own games and your own console. Have a question? Reply to this thread.

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