[Macpartners] Apple macOS Sierra 10.12 release

[David M. Templeton]

In early August 2011, I bought a Early-2011 15" Macbook Pro. The laptop is
from the first third of the year (obviously), and originally came with 10.6
Snow Leopard installed. About a week before I got my MBP, 10.7 Lion was
released, which modified the firmware of supported laptops to allow
Internet Recovery (because that was the first Mac OS version that didn't
come on disc). The laptop I got had 10.7 pre-installed, and because of the
firmware tweak, it could not be downgraded to 10.6.

It's certainly possible that existing Mac models that get 10.12 installed
won't be downgradable to 10.11, but we don't know yet.

It's almost a certainty that new Mac models announced (hopefully) next
month won't be downgradable to 10.11, especially the ones that come with
new hardware features (ie. touch-sensitive OLED function row).

On Tue, Sep 20, 2016 at 3:05 PM, Timothy Yager <tyager at mit.edu> wrote:

> Hi Teddy,
>
>
>
> That is correct. The issue is with new hardware only. Apple won’t support
> / allow installs of older OS’s in their new models so you can only use the
> latest.
>
>
>
> -Tim
>
>
>
> *From: *Teddy Thomas <tthoma24 at mit.edu>
> *Date: *Tuesday, September 20, 2016 at 2:47 PM
> *To: *Timothy Yager <tyager at mit.edu>
> *Cc: *macpartners <macpartners at mit.edu>, itpartners <itpartners at mit.edu>
> *Subject: *Re: [Macpartners] Apple macOS Sierra 10.12 release
>
>
>
> 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/
>
>
>
> *Before you upgrade to macOS Sierra*
>
> •    Before performing any upgrade, always back up your computer using
> 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> 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>
>
> •    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>
>
>
>
> *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
>
>
>
> If you have questions or need assistance, please contact the IS&T Service
> Desk at helpdesk at mit.edu or 617.253.1101. You can also submit a request
> online <http://ist.mit.edu/help>.
>
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>
>
>
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