Apple updates iTunes with EQ, large library fixes
Apple posted a maintenance update to iTunes for Mac and Windows today. The new version, 11.1.3, is available for download from Apple's web site and through the Software Update system preference.
According to Apple's release notes:
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.