: Download the Nintendo Switch Firmware 21.0.0 (typically a .zip or .xci file) from a trusted source. Step 2: Install the Prod Keys
Nintendo released System Firmware 21.0.0 in late 2024/early 2025 (depending on your region). Unlike minor patches that simply fix stability issues, version 21.0.0 brought under-the-hood changes to the Switch’s encryption and security modules. ryujinx prod keys 21