The document summarizes the highlights from Apple's WWDC 2015 event. It discusses the success of OS X Yosemite which had a 55% adoption rate within 8 months. Apple announced OS X El Capitan as the next version, focusing on refinement. Key new features include improved Messages, ability to pin sites in Safari, and natural language searches. Performance is improved with apps launching 1.4x faster and Metal allowing graphics processing to be 10x faster. El Capitan will have a public beta in July and be available in the fall as a free upgrade.