To fix the error, you must first understand the hardware it references.
When a flashing tool or loader script requests a file named loader for iphone9 3d101ap, it is looking for a low-level bootloader or firmware trampoline—typically used to put the device into PWNDFU (Pwned DFU) mode or to bypass iCloud/Baseband initialization. loader for iphone9 3d101ap not found updated
The "not found updated" component indicates that the tool’s local or cloud repository does not contain a version of this loader that matches your current iBoot or SEP (Secure Enclave Processor) firmware, likely because Apple has patched the exploit the older loader relied upon. To fix the error, you must first understand
This is the specific Board ID for the iPhone 7. When tools attempt to flash the device, they must verify they are communicating with the correct hardware revision. The tool looks for a component of the SecureROM (the read-only memory chip containing low-level boot instructions) often referred to as the "loader" or "iBEC/iBSS" files tailored for this specific board. When a flashing tool or loader script requests
A surprising number of "loader not found" errors stem from a partial DFU state.
For iPhone 7, standard DFU mode is often not enough for custom restores. You must enter Pwned DFU Mode.