This is not about the endianness of the processor, but about the endianness of the RSA signatures placed in the file - which is a programming decision, not an a

This is not about the endianness of the processor, but about the endianness of the RSA signatures placed in the file - which is a programming decision, not an architecture/hardware one. Apple machines are little-endian, as are any other IA32e machines. The rest of the common 'full' architectures (ARM, MIPS, Power, SPARC, ...) are bi-endian, that is they can switch endianness on demand via a register. People have finally realized Little Endian is the only true endianness ;).