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One final misunderstanding that I don't quite get is that while MacOS is a UEFI based operating system, Bootcamp Windows 10 installs are actually inside the APFS container with an MBR. I have done a little research on APFS and think I understand that what I had been using was One APFS volume that encompassed the other partitions and that it was unalterable under anything but the Bootcamp utility which would only remove it and everything in it. Each time I could only see a way to have one large APFS volume because it wouldn't show the other partitions with any room leftover in Disk Utility. Prior to installing Monterey, I tried to make two linux partition and leave a free space for windows using Gparted and also with Disk Utility under MacOS installer. Now I have started over again and have a freshly install Monterey and have not installed Bootcamp but the entire 1 TB SSD is formatted with APFS. I was able to force boot into Windows 10 using Plop boot manager, but that must have corrupted something because on the next boot it said it needed a recovery windows media. It booted correctly on each partition once or twice until suddenly Windows 10 wouldn't boot and neither would Kali. I got it all working, following the same process but then adding on the Kali linux install in the free space following Ubuntu. I wasn't sure if there would be some problems associated with that and I liked the idea of a clean Monterey install so I wiped the 1TB SSD with Parted Magic and reinstalled Monterey from a usb again. So, I tried a number of things but this left me with the only option which was to remove Bootcamp through MacOS which ended up destroying Ubuntu in the process and reallocating all the space back to MacOS. It wouldn't let me pass the error: "Windows 10 requires a media driver" and when I browsed both the already installed system (which I verified was still intact) or used a freshly created usb from The Media Creation Tool, Windows 10 could not find any relevant drivers. Something stranged happened to the Windows install where it reverted back to the install Windows ten screen. The setup worked great but after sometime, and I'm assuming a MacOs update, only the Ubunutu and MacOs partitions would boot. I have questions and problems and don't quite understand some fundamentals about the process. You can boot from Monterey or Windows 10 to anywhere, but from Sierra you have to boot to Windows first and then you can get back to Monterey from there.I followed this tutorial about a year ago on MacOs Catalina Machine to install Bootcamp, then shrink the partition within Windows 10, then install Ubuntu: If you need to boot from one to the other headless/remotely, like me. Now you've two options, make another partition on the internal SSD and just clone over the Sierra, or just leave it on the external.I'm leaving it external for now. Install Monterey first, set up, then Bootcamp and Windows 10 on internal drive. Install Sierra to internal drive, set it all up, (auto login, boot after power loss, all the uptime stuff).then, boot to recovery, and clone the internal drive to an external (I used a cheap SATA SSD in a case). Wipe computer first.btw good time to give SSD a refresh, so use Parted Magic secure erase.get your Sierra USB key ready.įormat internal SSD HFS+. Hi so for anyone interested I'm messing with this at the moment, triple boot Monterey, Windows 10, and Sierra on a 2013 Mac Pro. I almost always have to simple restart and choose the desired system from the Option/Alt boot picker screen. Also, I often can't choose a higher system to restart through the Startup Disk pref pane. Interesting note: If you boot from El Capitan with that multi-boot drive, any systems from High Sierra up are not visible at all (won't see APFS partitions. You can still see your files on a Monterey system, but you might not be able to make any changes on the Monterey drive, unless you are actually booted to that Monterey system. If you boot to High Sierra, and a Monterey partition mounts, you will get the message. Does not make a difference if the two systems are on the same disk, or separated between internal to external disks. You will find that it will always appear when first booting to High Sierra, and another bootable system has Monterey (or higher). It's just the Monterey bootable partition. ) If I boot on that drive from High Sierra, I always get the "Incompatible Disk" message. 13 full system installs (a "tredecuple" boot, I think it might be called. I have a single drive with separate partitions for all Mac system full installs from Leopard to Monterey.