Incorrect eMMC operations can permanently brick your Switch. Only proceed if you fully understand the risks.
Safely eject the card, insert it into your Switch, and attempt to boot. 2. Perform a Clean Atmosphere Installation
Drag-and-drop file corruption during a manual update.
To help pinpoint the fastest resolution path for your console, let me know: pkg2 read failed failed to launch hos
Often, a mix of old configuration files and new firmware causes the mismatch.
Ensure your SD card is formatted to . You can test for corruption or "fake" capacity using tools like h2testw. Restore Backups
Even using the correct tools, a botched update can cause this error. If your Switch loses power or you force a reboot in the middle of a firmware update process (whether official or using homebrew tools), the pkg2 data on the NAND can be left in a corrupted, half-written state. Similarly, manually replacing fusee-primary.bin (the Hekate payload) with an older version than your Atmosphere installation can break the boot chain. Incorrect eMMC operations can permanently brick your Switch
If all else fails, the SD card’s file system is likely corrupted (especially if you use exFAT).
Copy the fusee.bin payload into the /bootloader/payloads/ directory on your microSD card. 2. Update the Hekate Configuration File
If these two numbers do not match, the bootloader will refuse to proceed, throwing the pkg1/pkg2 mismatch error. This frequently happens when a user: Ensure your SD card is formatted to
When launching through a custom bootloader, choosing "Stock" still requires the app to parse the system keys. If the boot files are outdated, they cannot properly map the configuration pathways required to launch the stock Horizon Operating System environment.
: You updated your Switch firmware but are still using an older version of Hekate or Atmosphere that doesn't support it.
The error is a classic sign of a corrupted boot chain on a modded Nintendo Switch. While initially alarming, it is rarely a hardware-killing brick. In over 95% of cases, the solution is as simple as deleting old Atmosphere files, replacing them with fresh copies, and ensuring your hekate_ipl.ini points to package3 instead of pkg2 .
means the bootloader, Hekate, has failed to start the Horizon OS (Nintendo’s official operating system) because the necessary system package (pkg2) is corrupt, incompatible, or inaccessible. Primary Causes