Apple to release new Mac operating system Wed.

Associated Press
In this  Thursday, July 19, 2012, photo an Apple customer Shayan Hooshmand, 11, uses PhotoBooth on a 21.5-inch iMac at an Apple store in Palo Alto, Calif. Apple Inc. reports quarterly financial results after the market closes on Tuesday, July 24. (AP Photo/Paul Sakuma)
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In this Thursday, July 19, 2012, photo an Apple customer Shayan Hooshmand, 11, uses PhotoBooth on a 21.5-inch iMac at an Apple store in Palo Alto, Calif. Apple Inc. reports quarterly financial results after the market closes on Tuesday, July 24. (AP Photo/Paul Sakuma)

NEW YORK (AP) — Apple will release its new operating system for Mac computers on Wednesday.

Dubbed Mountain Lion, the new system has features borrowed from the iPhone and a tighter integration with online file storage.

Apple Inc. previously disclosed the features. It announced the availability date on Tuesday as it released its earnings report for the April-June quarter.

The new system will cost $20 and will be available only for download. Only computers running the two most recent versions of Mac OS, Lion and Snow Leopard, can be upgraded.

Macs bought on or after June 11 can be upgraded for free.

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