boot9strap 将会在 NAND 里的内容加载完成后启动 `boot.firm` 文件。 In this case, we are using Luma3DS by [LumaTeam](https://github.com/LumaTeam/) to patch the console, allowing it to run homebrew software.
On this page, we will make critical system file backups and install some homebrew programs. Most of these steps will be automated using a script that you will run on your console.
+ **[Checkpoint](https://github.com/FlagBrew/Checkpoint)** *(backs up and restores save files for 3DS and DS games)*
+ **[ftpd](https://github.com/mtheall/ftpd)** *(access your 3DS SD card wirelessly)*
+ **[Universal-Updater](https://github.com/Universal-Team/Universal-Updater/)** *(a homebrew app store for downloading homebrew from the 3DS over Wi-Fi)*
+ **[GodMode9](https://github.com/d0k3/GodMode9)** *(multipurpose tool which can do NAND and cartridge functions)*
If you don't want one of these applications, you can remove them after you have finished this page by navigating to System Settings -> Data Management -> Nintendo 3DS -> Software. (GodMode9 cannot be removed in this way and is generally required for other functions.)
如果你的 **New 3DS** 的系统在很早以前通过某些手段降级到了 2.1.0,则你应该在继续前先[还原你的 NAND 备份](godmode9-usage#restoring-a-nand-backup)。 This likely doesn't apply to you unless you were following this guide in 2017.
As an additional safety measure, we will perform an additional check for custom firmware. If custom firmware is not installed by this point for any reason, the next section may render your console unable to be hacked without external hardware.
If you do NOT boot into the Luma3DS configuration menu, custom firmware was not installed on your console. Join [Nintendo Homebrew on Discord](https://discord.gg/MWxPgEp) and ask, in English, for help.
1. Copy the contents of `finalizing.zip` (`finalize`, `gm9`, and `luma`) to the root of your SD card, merging/replacing any existing folders if prompted
+ If you are using a Mac, hold the Option key while dragging the folders to the root of your SD card, then click "Merge"
1. Delete `boot.firm` and `boot.3dsx` from the root of the SD card
1. Copy `boot.firm` and `boot.3dsx` from the latest Luma3DS `.zip` (the one you just downloaded) to the root of the SD card, replacing any existing files if prompted
1. Reinsert your SD card into your console
The screenshot below indicates the minimum SD card layout that is required to follow this page. 由于你可能在之前做了一些其他的操作,你的 SD 卡中可能会多出一些文件或者文件夹。
+ If one of these buttons is broken, download [config.ini]({{ base_path }}/assets/config.ini) and put it in your `luma` folder, replacing the existing one. This will change the Rosalina menu key combination to (X) + (Y)
+ If you do not boot into GodMode9, ensure that you copied the three folders from `finalizing.zip` to the root of your SD card and that the folders are not misnamed (e.g. `luma (1)`)
+ Holding (Select) on boot will launch the Luma3DS configuration menu.
+ Holding (Start) on boot will launch GodMode9, or if you have multiple payloads in `/luma/payloads/`, the Luma3DS chainloader.
+ By default, pressing (Left Shoulder) + (Down D-Pad) + (Select) while in 3DS mode will open the Rosalina menu, where you can check system information, take screenshots, enable cheats, and more. Rosalina 菜单的快捷键可以在其中更改。
+ Holding (Start) + (Select) + (X) on boot will make the notification LED show a color for debug purposes. 参见[更新日志](https://github.com/SciresM/boot9strap/releases/tag/1.4)以获取信息。