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Apple Updates Mountain Lion to 10.8.1

Today, August 23, Apple pushed out the first update to OS X Mountain Lion. The update can be downloaded through the Mac App Store or through a direct download.

To run the update, open the Mac App Store, click “Updates” in the upper right of the app, and wait for the update to appear. Follow the on-screen prompts from there. The 20-30 MB file addresses fixes for iMessage, Migration Assistant, and audio on Thunderbolt displays.


Apple notes that the update includes “general operating system fixes that improve the stability and compatibility of your Mac.” The general notes about this update include 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.

More detailed information is on this page:

Security information is found here:

According to some developers, this update may also address battery life challenges on some systems. Your impact may vary on the battery front, but it is a positive sign. Our machines haven't experienced battery woes with Mountain Lion, so we'll continue to monitor the performance impact with this new update.

While the update was just released today, Apple also seems to be already working on the next update to Mountain Lion, 10.8.2.

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