.DYLIB File Extension
File TypeMach-O Dynamic Library
What is a DYLIB file?
Macintosh library that contains declarations and functions referenced by a Mac OS X application; loaded dynamically by various programs when needed, which allows for efficient use of memory; may be referenced by open applications or by Apple Xcode during software development.
Mach-O is short for "Mach Object" and refers to a file format used by systems based on the Mach kernel, such as NeXTSTEP and Mac OS X.