Apple today released iTunes 11.1.3, two weeks after iTunes 11.1.2 and OS X Mavericks were first released. The update fixes issues with the equalizer and performance when switching views in large libraries. iTunes 11.1.3 This version of iTunes resolves an issue where the equalizer may not work as expected and improves performance when switching views in large iTunes libraries. This update also includes additional minor bug fixes. Note: If you are using OS X Mavericks, your book library can now be found in iBooks for Mac. For information on the security content of this update, please visit: support.apple.com