Mac OS X Lion 10.7.5 (installed system for Intel. Easy and fast installation) | 4.55...
Gestures & animations - new multitouch gestures
Auto-Save preservation working condition even after logging out
Versions - Time Machine for documents - manage document versions in two mouse clicks
Resume - saves the state of your Mac after a restart, including all applications, sites and documents
Mail 5 - new e-mail client style iPad
AirDrop...