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The Mac Mini with Coffee Lake processor was only discontinued on 17th January this year so it should get support for a few years yet.
 
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Apple seeded a first macOS Sonoma build (23A5257q) to developers
(two posts above this one were a bit quicker to mention the goodies)
 
Comparison:

2022 (Ventura):
iMacs, 2017+
iMac Pro, 2017
MacBook Air, 2018+
MacBook Pro, 2017+
Mac Pro, 2019+
Mac Studio 2022
Mac Mini, 2018+
MacBook, 2017

2023 (Sonoma):
iMacs, 2019+
iMac Pro, 2017
MacBook Air, 2018+
MacBook Pro, 2018+
Mac Pro, 2019+
Mac Studio, 2022+
Mac Mini, 2018+

This year doesn't look as harsh as last year. The MacBook from 2017 has been dropped, iMacs 2017-2018 dropped, and MacBook Pros from 2017 were dropped. Otherwise, the same.
Mixed feelings. Go by date-released and the spec changes were pretty tame, but date-discontinued has gotten harsher. Ventura dropped the 2015/2017 Air, last sold July 2019, and the 2013 MacPro, last sold December 2019. Sonoma drops the 2017 21.5" iMac, which was still sold new until October 2021.

Granted, the 2017 iMac had been largely replaced 2019 with only the entry level model lingering as a last vestige, but I've still got a bad feeling the 2019 Mac Pro, 2018 Mini, and other Intel models by extension, will only receive support for two more MacOS major versions, with Somona counting as the first of those two.

Only good news is that the 2019 iMac is still supported, so the T2 chip can't be a requirement.
 
Hi to all!
Clean installed macOS 14 beta1 Sonoma on my CMP 3.1... ..works?
No graphics acceleration, no wifi+BT (BCM94360CD), no some anymore? ))
OpenCore config compilled by OCLP 0.6.6
Best Regards for team of dev's!
 

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MBP11,3: macOS 14 developer beta installs from OCLP’d USB flash drive (which now must be bigger than 16 GB) on an external Thunderbolt 2 SSD, boots, and OCLP 0.6.7 can be installed to the EFI; but no Wi-Fi during macOS setup, no mouse scrolling in the Finder (only the built-in trackpad works as it should), and above all installing the root patches fails (complaining about not finding the GeForce bundle in some var folder): so currently no accelerated graphics and thus end of the experiment! Beautiful desktop in macOS Sonoma, anyway…
 
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macOS 14 beta 1 does boot with the latest OCLP on an iMac 11,2 with an upgraded gpu.

Things I have noticed:
WiFi brcm94360cs2 does no longer function (probably needs patching now with this version).

Gpu acceleration is very broken as you can see by the background(this was after post install root patches), although animations and such are smooth again. It does seem to only be related to the background image.

Audio works!

Display brightness no longer works.

Ethernet works!
 
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