.JNILIB File Extension
File TypeJNI Library
This file is saved in a binary format, which requires a specific program to read its contents.
What is a JNILIB file?
Developer library used by JNI (Java Native Interface), a framework that allows Java to integrate with other programming languages; contains functions or methods that provide the invocation interface between the programming languages.
The Mac Developer Library documentation states that JNI libraries written for Mac OS X must use the ".jnilib" extension.