Original sentence: He also confirmed rumors - based on the existence of a version of Darwin for the Intel architecture, and the ability of OPENSTEP to run on various architectures - that Apple has had versions of Mac OS X running on Intel processors for most of its developmental life
Edited sentence: He also confirmed rumors - based on the existence of a version of Darwin for the Intel architecture - that Apple has had versions of Mac OS X running on Intel processors for most of its developmental life.This may not necessarily be surprising - Mac OS X's predecessor OPENSTEP was able to run on four different architectures, including Intel