Apple Issues Software Update to Mountain Lion Developer Preview 4 - MacRumors
Skip to Content

Apple Issues Software Update to Mountain Lion Developer Preview 4

Apple has issued a software update via the Mac App Store to Mountain Lion Developer Preview 4, originally released last week.

NewImage
This update is the second time Apple has updated the Mountain Lion Developer Preview via the Mac App Store rather than releasing an entirely new DP -- Apple issued a similar update in May.

Apple did not specify changes in the update, saying only that it "is recommended for all users running OS X Mountain Lion Developer Preview 4. With Mountain Lion's final release expected next month, Apple should be moving towards a final build soon.

Among other things, the update adds support for more Facebook notifications and PowerNap support for supported machines. It weighs in at 1.08GB and has a build number of 12A248, up from 12A239 previously.

Popular Stories

app store monthly sub commitment

Apple Introduces App Store Monthly Subscriptions With 12-Month Commitment

Monday April 27, 2026 12:52 pm PDT by
Apple today announced the launch of a new subscription option for App Store developers: monthly subscriptions with a 12-month commitment. The new option allows developers to offer subscribers discounted pricing typically associated with an annual subscription but paid on a monthly basis to keep payments more affordable. This new payment option allows you to offer subscribers more affordable...
Dynamic Island iPhone 18 Pro Feature

This Is What the iPhone 18 Pro Looks Like

Saturday April 25, 2026 10:00 am PDT by
A recent leak provides our best look yet at the design of Apple's upcoming iPhone 18 Pro and iPhone 18 Pro Max models. Leaker Sonny Dickson recently shared images of the first iPhone 18 Pro, iPhone 18 Pro Max, and foldable iPhone dummy models. The images largely conform with rumors about the designs of the three devices and provide the first real visual confirmation of how they will look. ...
MacBook Pro Low Angle Wide Lens

Apple to Launch 'MacBook Ultra' With These Six New Features

Friday April 24, 2026 10:32 am PDT by
While the 14-inch and 16-inch MacBook Pro were just updated with M5 Pro and M5 Max chips last month, bigger changes are reportedly around the corner. According to Bloomberg's Mark Gurman, the higher-end MacBook Pro models will be receiving a major redesign by early 2027, and he said that Apple might use "MacBook Ultra" branding for them. If so, the MacBook Ultra would likely be a...

Top Rated Comments

181 months ago
They are working fast.
Score: 13 Votes (Like | Disagree)
181 months ago
Thanks, downloading now! Very happy with Mountain Lion thus far. I feel it is what Lion should have been.
Score: 11 Votes (Like | Disagree)
koruki Avatar
181 months ago
They should just put Puma back on sale and see if anyone notices :cool:
Score: 6 Votes (Like | Disagree)
181 months ago
They are working fast.

There's still a ton of bugs, so they have a lot to clean up before next month.
Score: 5 Votes (Like | Disagree)
181 months ago
They toned-down the ridiculous dock shadow.

Now it doesn't spread its shade all over your open windows.
Score: 4 Votes (Like | Disagree)
181 months ago
Behold, the Zebra Wallpaper!!!! :eek::D
Score: 4 Votes (Like | Disagree)