Mac OS Mountain Lion takes ideas from the iPhone and iPad. Apple released a developer preview of the new Mountain Lion software Thursday.
Apple said the new software will be on sale this summer, a year after it released the latest update, "Lion." The preview version will help software developers make products that take advantage of the new features of the operating system.
Mountain Lion will include Game Center, an iPhone app which stores high game scores and helps users find opponents. It will be integrated with iCloud, the new Internet storage service designed for the mobile devices.
The new Messages app, also copied from the mobile operating system, will replace iChat. Lion users can download a preview version of the app for free.
A new Notification Center will show alerts from email and calendar programs, just like on the iPhone.