Mac OS X v10.6.7 Supplemental Update for 13 MacBook Air (Late 2010)
This update addresses an issue that makes the system unresponsive when using iTunes.
It is recommended for all 13" MacBook Air (Late 2010) users running Mac OS X v10.6.7.
SHA1 = 69ee7eec2b608199ffc215cc56e1a999b958397f
Read more http://support.apple.com/kb/DL1370