If you are using , Checkra1n , or Odysseus , the most common cause is an outdated version of the software. Developers frequently update these tools to include the latest "manifests" and "loaders."
The loader is usually extracted from the official Apple firmware (.ipsw). If you are trying to restore to a version of iOS that is no longer signed, or if you downloaded the (Global) firmware instead of the iPhone9,3 (GSM) firmware, the tool will fail. loader for iphone9 3d101ap not found
The error is essentially a communication breakdown. Most users can solve this by updating their restoration software or ensuring they have the GSM-specific firmware for the iPhone 7. If you are using , Checkra1n , or