For users involved in research or jailbreaking, this error often appears when using tools like checkra1n or pongoOS . If the tool’s payload library lacks the specific header or offset for the d101ap board revision, it will fail to "load" the necessary environment into RAM. Technical Implications
While Apple officially skipped the "iPhone 9" name, internally, the iPhone 9,3 identifier is used specifically for the GSM-only model of the (Model A1778). The term Loader For Iphone9 3-d101ap Not Found