Mac OS X 10.8.1

Mac OS X 10.8.1 was an update to Mac OS X 10.8 released on August 23, 2012. It included general operating system fixes that:
 * Resolve an issue that may cause Migration Assistant to unexpectedly quit
 * Improve compatibility when connecting to a Microsoft Exchange server in Mail
 * Address an issue playing audio through a Thunderbolt display
 * Resolve an issue that could prevent iMessages from being sent
 * Address an issue that could cause the system to become unresponsive when using Pinyin input
 * Resolve an issue when connecting to SMB servers with long names
 * Address a issue that may prevent Safari from launching when using a Proxy Automatic Configuration (PAC) file
 * Improve 802.1X authentication with Active Directory credentials.

External References
Apple: OS X Mountain Lion 10.8.1 Update