Look for a line like:
Do not waste time patching ancient software. Use a tool that . loader for iphone9 3d101ap not found better
When the tool outputs "loader for iphone9 3d101ap not found," it is telling you a simple thing: Look for a line like: Do not waste
If you are determined to use a specific loader and it still won't find your device: loader for iphone9 3d101ap not found better
For iOS 10.x on 64-bit devices (like the iPhone 7), is generally considered the "better" and more modern loader. It is a "kernel-less" jailbreak, meaning it doesn't fight the iPhone 7’s hardware security in a way that causes crashes.