Complex sentence: The Macintosh is not a direct descendant of Lisa, although there are obvious similarities between the systems and the final revision, the Lisa 2/10, was modified and sold as the Macintosh XL.
Split into simpler sentences: The Macintosh is not a direct descendant of Lisa, although there are obvious similarities between the systems. The final revision, the Lisa 2/10, was modified and sold as the Macintosh XL.