as soon as I resolve may I post a resulting message about how I fixed, If it's of any interest for anyone here and would be relevant in the thread.
Hi again, chaps!
Now I can share how I sucessfully
restored my Windows-11 bootable (EFI - GPT ) either form behind OC or without prior OC picking. The task was to install Billy Gate's system onto a separate internal SATA drive. Actually I made up my mind to follow
hwojtek 's wise advice to reinstall Windows with OC without looking for intricate ways.
The steps to follow if someone wants to do same:
- with Disk Utility you have to ensure that the target drive is a
GPT drive formatted as win NTFS or exFat (this can be reformatted later from inside Win installation procedure)
- with Bootcamp Assistant you prepare as requested a
Windows installation U-disk and create a
Bootcamp partition on the internal drive with the smallest possible size (you may never use it later, you can, though, if you want it for some other purpose). Guess this is to integrate Windows into Mac's system and activate Windows bootability.
(Am I wrong, pals? Or this is an unnecessary step?)
- after the computer reboots press Opt key to pick Efi OC to boot and then pick "Windows" (this is your U-disk for GPT Windows placement) and let the installer work. When it's time to choose target you point to the already prepared disk (with a name you assigned before). If previously it was exFAT you are to reformat it on the spot (with that the disk will be automatically awareded with the standard BOOTCAMP name - *later you will discover two different BOOTCAMPs in your system ( which hopefully can be remedied later by renaming the partition with the alreay installed Windows).
- Windows reboots 3 times from inside the OC, you are likely to check the automatic correct picking of "Windows" (not the OsX Monterrey or other)
- as soon as all is finished including the Apple Windows support packade stetting up remember to
remove/disable Boot Camp manager application from Autostarts (through e.g. Tasks manager)
PRIOR to Windows reboot after the package is over- this is highly important otherwise you will get system freeze with the distorted graphics screen. In the latter case you can exclude the unfortunate Boot Camp manger from Autostart list within Windows safe mode.
In the long run you will get Windows bootable ftom both: either from behind the OC wall or not, which is also very pleasant.
. I've got the whole system working fine on my iMac
27-mid2010.
Since I was in a hurry to revive and blow life into my system with MacOS and Windows I had not checked/studied the possibility of
removing the small BOOTCAMP partition created by Bootcamp assistant or
renaming the other Bootcamp partition where Windows rests: was not determined to run into new problems. Maybe the OCLP connoiseurs here know the exact consequencieds of such post-instlall (probably risky) actions. Let them answer, anyway that would be a precious comment.
I omit description of Windows 11 U-disk preparation for unsupported computers, which is a separate story, sorry now. Since this is irrelevant in this thread.
