Mach-O File Format 4GB Limit

Mach-O (Mach Object) is a binary file format used by macOS and iOS for executables, libraries, and object code. A Mach-O file consists of a header, followed by a series of load commands, and then a series of segments. The 4GB Limitations The original 32-bit format used 32-bit offsets, which can address a maximum of 2^32 bytes, or 4GB of memory. The 64-bit variant uses 64-bit offsets, vastly…