Complex sentence: Under NeXTSTEP, OPENSTEP and Mac OS X, multiple Mach-O files can be combined in a multi-architecture binary; this allows a single binary file to contain code to support multiple instruction set architectures.
Split into simpler sentences: Under NeXTSTEP, OPENSTEP and Mac OS X, multiple Mach-O files can be combined in a multi-architecture binary. This allows a single binary file to contain code to support multiple instruction set architectures.