The newest version of Apple’s Macintosh operating system would go on sale on October 26, hitting the market after a four-month delay due to the company's work on the iPhone.

New features include a file back-up feature called "Time Machine," improvements to e-mail and instant messaging, the ability to preview documents or files without launching a separate program, and quick access to other computers on a home or office network.

The new version of Apple's OS X software, called Leopard, will cost $129 for a single user and $199 for a family pack that can be installed on up to five computers in one household.

Reuters