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You can update to the latest version of iTunes for your Mac through Software Update or download it using the following link:
Apple iTunes (10.6.3) for Mac OS has the following new features and
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- Addresses a problem where iTunes may become unresponsive when syncing an iPad (1st Gen) that contains iBooks textbooks.
- Fixes a problem where photos synced to a device may appear in an unexpected order
- Resolves an issue where iTunes may unexpectedly delete apps on a device.
- Improves overall performance and reliability