[Macpartners] Apple macOS Sierra 10.12 release

[Teddy Thomas]

Thank you all! That helps planning immensely.

-Teddy

> On Sep 20, 2016, at 3:19 PM, Thomas Brand <tbrand at mit.edu> wrote:
> 
> Good afternoon Teddy,
> 
> Tim is right.
> 
> Macs built for a specific release of Mac OS X cannot be downgraded to an earlier version of Mac OS X.
> Earlier versions of Mac OS X lack the hardware drivers needed to boot the latest hardware.
> This has been the case with all Macs going back to the early days of the Mac OS.
> This does not apply to models that were released prior to the release of the new OS.
> These Macs can continue to boot into their original oeprating system until the are replaced with upgraded hardware.
> 
> I hope this helps,
> Thomas Brand
> 
> 
> On Tue, 20 Sep 2016, Teddy Thomas wrote:
> 
>> Timothy-
>> 
>> It is my understanding that there is nothing different about macOS Sierra with regard to downgrading to an older version of macOS. Previous versions of macOS have always been able to be installed on any Mac, with the caveat that you must do a clean install from bootable media and restore data from a backup. Can you cite a source stating differently? Any clarification is much appreciated. Thanks in advance.
>> 
>> -Teddy
>> 
>>> On Sep 20, 2016, at 11:00 AM, Timothy Yager <tyager at mit.edu> wrote:
>>> 
>>> Good morning,
>>> 
>>> Today Apple releases its latest operating system, macOS Sierra (10.12). Please note that soon all Macs purchased from Apple will come with macOS Sierra preinstalled; previous versions of OS X cannot be installed. This email provides information for those considering an upgrade to the latest OS release.
>>> 
>>> What’s new
>>> http://www.apple.com/macos/sierra/ <http://www.apple.com/macos/sierra/> <http://www.apple.com/macos/sierra/ <http://www.apple.com/macos/sierra/>>
>>> 
>>> Before you upgrade to macOS Sierra
>>> •    Before performing any upgrade, always back up your computer using CrashPlan <https://ist.mit.edu/crashplan/ <https://ist.mit.edu/crashplan/>> or the backup system provided by your local IT support provider (e.g., local Time Machine backup).
>>> •    Go to the macOS Sierra Known Issues page <http://ist.mit.edu/macos/1012 <http://ist.mit.edu/macos/1012>> on the IS&T Software Grid to check for software compatibility. Staff should consult with their department’s IT support provider to determine when to upgrade.
>>> •    MIT-owned machines should be upgraded by downloading macOS Sierra from the Apple App Store or via Casper for managed Macs.
>>> •    Personally owned machines can be upgraded via the Apple App Store.
>>> 
>>> Upgrade Resources
>>> •    Documentation on how to upgrade to macOS Sierra via the Apple App Store <http://www.apple.com/osx/how-to-upgrade/?cid=wwa-us-kwg-mac <http://www.apple.com/osx/how-to-upgrade/?cid=wwa-us-kwg-mac>>
>>> •    Documentation on how to upgrade to macOS Sierra via Casper for managed Macs <http://kb.mit.edu/confluence/display/istcontrib/Casper+-+Upgrading+Macs+to+OS+X+El+Capitan <http://kb.mit.edu/confluence/display/istcontrib/Casper+-+Upgrading+Macs+to+OS+X+El+Capitan>>
>>> 
>>> Hardware Requirements
>>> •    Any Mac capable of running OS X 10.7.5 or later
>>> •    2GB of memory
>>> •    8.8GB of available storage
>>> •    More info from Apple, including models: http://www.apple.com/macos/how-to-upgrade/#hardware-requirements <http://www.apple.com/macos/how-to-upgrade/#hardware-requirements><http://www.apple.com/macos/how-to-upgrade/#hardware-requirements <http://www.apple.com/macos/how-to-upgrade/#hardware-requirements>>
>>> 
>>> If you have questions or need assistance, please contact the IS&T Service Desk at helpdesk at mit.edu <mailto:helpdesk at mit.edu> <mailto:helpdesk at mit.edu <mailto:helpdesk at mit.edu>> or 617.253.1101. You can also submit a request online <http://ist.mit.edu/help <http://ist.mit.edu/help>>.
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