Apple Releases OS X 10.8.1 with Fixes for Migration Assistant, Exchange, and iMessage Issues - MacRumors
Skip to Content

Apple Releases OS X 10.8.1 with Fixes for Migration Assistant, Exchange, and iMessage Issues

mountainlionApple today released OS X 10.8.1, the first maintenance update to OS X Mountain Lion. The update is available directly from Apple's site or via the Software Update mechanism that directs users to the Mac App Store for updates.

The update is Build 12B19, up two build numbers from last Friday's developer seed.

This update includes general operating system fixes that improve the stability and compatibility of your Mac, including 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.

OS X 10.8.1 is a relatively small update at just 24.2 MB, with Apple pushing out a handful of high-priority fixes for issues discovered in the initial public release of OS X Mountain Lion.

Popular Stories

Dynamic Island iPhone 18 Pro Feature

11 Reasons to Wait for the iPhone 18 Pro

Monday May 11, 2026 9:01 am PDT by
We're only four months out from the launch of Apple's premium next-generation smartphone lineup, and while we're not expecting a sea change in terms of functionality, there are still several enhancements rumored to be coming to the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth noting is that Apple is reportedly planning a major change to its iPhone release cycle this year, adopting a...
iOS 26

iOS 26.5 Features: Everything New in iOS 26.5

Monday May 11, 2026 5:09 pm PDT by
Apple released iOS 26.5 after a few months of beta testing, and while it doesn't have the Siri features we were hoping for since those are being held until iOS 27, there are a handful of useful changes worth knowing about. Subscribe to the MacRumors YouTube channel for more videos. End-to-End Encryption for RCS Support for end-to-end encryption (E2EE) for RCS messages between iPhone and...
General Apps Reddit Feature

Reddit Starts Blocking Mobile Website, Pushing Users to App Instead

Monday May 11, 2026 6:10 am PDT by
Social network Reddit recently began blocking mobile visitors to its website while pushing them to download the official Reddit app, and it's fair to say that the move is not going down well with users. If you visit reddit.com on your iPhone today, you may see a new popup that can't be dismissed, asking you to "get the app to keep using Reddit." A Reddit spokesperson told Ars Technica...

Top Rated Comments

iBreatheApple Avatar
179 months ago
I was hoping for 10.9. :(
Score: 34 Votes (Like | Disagree)
OldSchoolMacGuy Avatar
179 months ago
Cue the complaints that it doesn't have a battery fix listed.
Score: 18 Votes (Like | Disagree)
MacBookPro13" Avatar
179 months ago
iMessage being able to link phone numbers anyone?
Score: 15 Votes (Like | Disagree)
179 months ago
Are the days of the Combo updates long gone? Is there a 10.8.1 Combo available for download somewhere? :confused:
The Combo installers appear with the x.y.2 (and later) releases when there are multiple updates to combine, hence the name.

10.8.1 update - updates 10.8.0 to 10.8.1
10.8.2 update - updates 10.8.1 to 10.8.2
10.8.2 combo update - update 10.8.0 to 10.8.2 (includes 10.8.1 updates)

This is not new. It's been like this for years and years.

Note that all standalone Mac OS X updaters eventually show up here:

http://support.apple.com/downloads/

Again, nothing new.
Score: 14 Votes (Like | Disagree)
179 months ago
Nice!

I haven't installed it yet but Safari feels snappier too...
Score: 12 Votes (Like | Disagree)
cmChimera Avatar
179 months ago
Just updated. Screen seems more retinaish.
Score: 11 Votes (Like | Disagree)