Skip to main content

OS X Mountain Lion Officially Drops Support for Some Older 64-Bit Macs

 

With Apple having seeded the golden master build of OS X Mountain Lion to developers earlier this week, the company has locked in which Macs will support the forthcoming version of the operating system. While the machine requirements have been known for some time, the seeding of the final public release is a good time to remind users which machines will support Mountain Lion.

Your Mac must be one of the following models:
- iMac (Mid 2007 or newer)
- MacBook (Late 2008 Aluminum, or Early 2009 or newer)
- MacBook Pro (Mid/Late 2007 or newer)
- MacBook Air (Late 2008 or newer)
- Mac mini (Early 2009 or newer)
- Mac Pro (Early 2008 or newer)
- Xserve (Early 2009)
Ars Technica has more on Apple's decision, including discussion of why Apple has dropped support for some early 64-bit Macs that do support OS X Lion.
Apple declined to tell us the reasoning behind leaving some of these models out of potential Mountain Lion upgrades, but we suspected it was related to an updated graphics architecture that was designed to improve OS X's graphics subsystem going forward. Our own Andrew Cunningham suspected the issue was related to graphics drivers, since the GPUs not supported under Mountain Lion had drivers that were written before 64-bit support was common.
Information included with the first Mountain Lion GM now corroborates the connection to 32-bit graphics drivers as the culprit. While Mountain Lion is compatible with any Mac capable of running a 64-bit kernel, the kernel no longer supports loading 32-bit kernel extensions (KEXTs).
The report notes that some of the GPUs used in early 64-bit Macs were deprecated before 64-bit KEXTs were in common usage, and thus they were never upgraded from their original 32-bit KEXTs. With the affected machines now being a number of years old, Apple apparently decided that it was not worth investing the resources to upgrade those drivers to 64-bit in order to support OS X Mountain Lion.


OS X Mountain Lion Officially Drops Support for Some Older 64-Bit Macs
Eric Slivka
Wed, 11 Jul 2012 14:33:38 GMT

Popular posts from this blog

Apple Launches Web Tool to Deregister Phone Numbers from iMessage

Apple today released a new web tool for users to deregister their phone number from iMessage in the event they switched to a non-Apple device. To deregister a phone number from iMessage, users simply enter their phone number in Apple's web tool, receive a free text message containing a code, and submit the code to complete the process. Users who still have their original iPhone can also transfer their SIM card back to the device and go to Settings -> Messages to turn iMessage off. 


Users switching from an iPhone to another device were often unable to receive SMS messages from another iPhone due to their phone number still being linked to iMessage. These specific errors with iMessage have been a well-known issue since 2011, which is when the messaging service debuted with iOS 5. They were also made even more apparent this past May, where a server glitch caused widespread message delivery problems. Apple was even sued over the matter in a California court, although the company cla…

Microsoft acquires iPhone email app Acompli

After accidentally announcing it a little early, Microsoft is officially confirming it has acquired email startup Acompli. The surprise acquisition means Microsoft is picking up a powerful email client for iPhone and Android in another move that further cements CEO Satya Nadella’s focus on cross-platform technologies. The Verge’s Casey Newton called Acompl "the Outlook for iPhone that Microsoft hasn’t yet built," and it seems Microsoft was equally impressed with the powerhouse email app. "We’re excited about what’s possible as we build on the app’s success and bring it together with work currently in progress by the Outlook team," the company said in a statement. "Our goal is to deliver fantastic cross-platform apps that support the variety of email services people use today and help them accomplish more." Recode first reportedthat Microsoft would make its latest acquisition official today; the company is said to be paying over $200 million for Acompli. A…

iOS 10.3.2 now available to download on iPhone and iPad

Nearly a month and a half after iOS 10.3.1 rolled out to the public, Apple has now officially released iOS 10.3.2 on iPhone, iPad and iPod touch. We're still waiting on detailed release notes from Apple, but the update screen reveals that the new version of iOS focuses on bug fixes and security improvements.
Continue reading...
Trending right now:
WannaCry: Everything you need to know about the global ransomware attackTim Cook's refusal to help FBI hack iPhone is validated by 'WannaCry' ransomware attackNetflix is testing a price hike that would be pure evil

http://bgr.com/2017/05/15/iphone-ipad-update-ios-10-3-2-download-install/