Apple just released OS X 10.8 Mountain Lion a month ago, and now it’s already got an update. If you click “Software Update…” from your Apple icon menu, 10.8.1 should be ready to download. The update weighs only 24.2MB, and is mostly just a bunch of bug fixes, but you can read the full notes here:
The 10.8.1 update is recommended for all OS X Mountain Lion users and includes general operating system fixes that improve the stability and compatibility of your Mac. The 10.8.1 update also includes 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.