Including my notes to the above 2 solutions for putting in Home windows 11 23H2 on a 2010 iMac 27″ with 2TB HDD + 256GB SSD. My aim is, finally, a triple-boot configuration like
David Anderson mentions with macOS Excessive Sierra, Home windows 11 23H2, and Ubuntu 24.02. However for now, simply Home windows 11.
First, I de-fusioned the two inner drives and wiped their partition tables. I’ll sometime determine the partitioning magic to deal with 1/3 of the SSD and 1/3 of the HDD as a single logical disk for all 3 OSs… however that is not my aim right now. Immediately, I simply need to get Win11 23H2 on 1/3 of the SSD.
I created a flash drive utilizing Rufus with the Win11 23H2 ISO file, then added the Apple BootCamp 5.1.5621 information as described by David. I additionally added Cirrus drivers for the potential sound drawback, so every thing is on one flash drive.
I then used the Choice key (wired, Mac keyboard) besides this flash drive on my iMac.
To bypass the Win11 TPM and Safe boot checks, I adopted directions right here: https://www.tomshardware.com/how-to/bypass-windows-11-tpm-requirement.
On the level the place it asks me to pick out a partition to put in on, I wiped all partitions on the SSD, divided the capability by 3, and created a brand new partition on the SSD with that 1/3 capability. I did NOT run diskpart as described by David or onabanjo. I used the usual Home windows 11 GUI installer to do all of the partitioning and copying.
To create an area account and bypass the necessity for a Microsoft account (or a community connection in any respect), I adopted directions discovered right here: https://pureinfotech.com/bypass-internet-connection-install-windows-11.
As soon as set up was accomplished, I logged in to Home windows, added the RealTimeIsUniversal registry key, and put in the Cirrus sound driver from https://oemdrivers.com/sound-cirrus-logic-cs4206b-driver (and I up to date the show scaling to my most popular 100%). Rebooted.
Now connect with the Web and do updates. Notice that one of many updates causes the display screen to clean for a very long time, perhaps indefinitely. Permit it ample time (an hour?) to finish the replace and sync disks. Then energy off the machine and energy it again on.
At this level, it appears to be working properly. Besides I can not get the Bluetooth Magic Keyboard, Mouse, or Trackpad to work reliably. They join typically, however do not appear to remain linked. So utilizing a USB-connected keyboard and mouse appears an affordable tradeoff for not throwing out what appears to be a stupendous and really practical machine.
On to including Ubuntu… 24.04.1 put in no drawback on the 2nd of the three SSD partitions (being cautious throughout partition choice, in fact. And I put in Excessive Sierra on the third of the three SSD partitions.