Apple Seeds Build 12F13 of OS X Beta 10.8.5 to Developers - MacRumors
Skip to Content

Apple Seeds Build 12F13 of OS X Beta 10.8.5 to Developers

by

As noted by 9to5Mac, Apple has seeded build 12F13 of OS X beta 10.8.5 to developers, one week after releasing the first beta of 10.8.5.

build12f13
The update comes with no known issues and can be downloaded via Apple's Developer Page or through the software update tool in the Mac App Store.

Top Rated Comments

Menge Avatar
173 months ago
802.11ac is not officially supported in 10.8 to begin with. Supported in 10.9.

And the new MacBook Airs are being sold 10.9DP1, then? Because they do support 802.11ac...
Score: 7 Votes (Like | Disagree)
ghostface147 Avatar
173 months ago
Meanwhile over here in Mavericks DP2 land....things are going good.
Score: 5 Votes (Like | Disagree)
Menge Avatar
173 months ago
soundguyami does make a point Menge. Just because we have newer hardware doesn't mean the current OS X will support it. Just as how rMBP were being shipped with 10.7.x even though that edition of OS X was not fully optimized for the retina until Mountain Lion came out a few months later.

What I mean is this timeline:

10.8.4 (no 802.11ac yet) ---> Branch custom build for Airs with 802.11ac ---> merge 802.11ac into mainline for 10.8.5

Maintaining two custom versions of 10.8.5 (one for computers with 802.11ac and one without) makes no sense. It's more work for nothing. They had to have a custom build of 10.8 for the Airs for the launch, but believe me, at the first chance they get, they're gonna merge both branches. It makes sense that 10.8.5 is the merged build.
Score: 4 Votes (Like | Disagree)
MrNomNoms Avatar
173 months ago
No known issues, eh — If this update fixes the blue tinting I'm experiencing now and then when switching from Integrated to Discrete graphics on my 15" mid 2012 MacBook Pro, I'll be a happy little camper.

No issues? I guess this is not where Apple is going to address 802.11ac problems :rolleyes:

A part of me wants to die when I see the above posts; 'no issues' means 'no known regressions' - that is, new problems introduced by the update when compared against the previous release.
Score: 3 Votes (Like | Disagree)
litmag01 Avatar
173 months ago
No known issues, eh — If this update fixes the blue tinting I'm experiencing now and then when switching from Integrated to Discrete graphics on my 15" mid 2012 MacBook Pro, I'll be a happy little camper.

It is a feature, not necessarily a benefit.:)
Score: 1 Votes (Like | Disagree)
173 months ago
No issues? I guess this is not where Apple is going to address 802.11ac problems :rolleyes:

802.11ac is not officially supported in 10.8 to begin with. Supported in 10.9.
Score: 1 Votes (Like | Disagree)

Popular Stories

iOS 27 Next to iPhone

Here's When iOS 27 Rolls Out Today in Every Time Zone [Update: It's Out]

Sunday September 13, 2026 3:00 am PDT by
Update 10:04 a.m.: iOS 27 is rolling out now, though it may take a bit for all users to see it, so keep checking! Apple is about to release iOS 27, which will finally deliver more advanced Siri AI capabilities as well as a variety of other refinements, improvements, and new features to iPhones. It's Apple's biggest software update of the year, and Apple announced at Wednesday's iPhone event...
iOS 27 Icon iPhone

iOS 27 Available Now With These 8 New Features

Monday September 14, 2026 9:00 am PDT by
Update — 10 a.m. Pacific Time: Apple has released iOS 27. During its iPhone 18 Pro and iPhone Duo event last week, Apple announced that iOS 27 will be released widely on Monday, September 14. iOS 27 should be available around 10 a.m. Pacific Time / 1 p.m. Eastern Time today via the Settings app, under General → Software Update. Below, we have highlighted eight new features and...
Apple iCloud Plus expansion hero

iCloud+ Now Includes Apple TV, Apple Arcade, and Curated Apple Music Stations in Over 100 Countries

Tuesday September 15, 2026 1:43 am PDT by
Apple today announced a new subscription initiative that turns paid iCloud+ subscriptions into a broader services bundle in more than 100 countries. In select countries, Apple says every paid iCloud+ plan, including the cheapest 50GB tier, now includes Apple TV and Apple Arcade "at no additional cost," while family sharing extends the storage, TV and Arcade access to up to five people....