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maflynn

macrumors Haswell
Original poster
May 3, 2009
74,500
44,790
Odd, bootcamp issue.
My issues all date back to having the Fusion drive on my iMac (5k 2015 model), and not being able to upgrade to Anniversary edition. Couple that with the need to have windows on the SSD and not spinning drive, pushed me to defuse my drive (again). As a side note, I had a very hard time splitting them up following these directions Macworld How to split up a Fusion Drive I had to use gpt to remove the disks, I suspect this may have been the root of my issue with not upgrading to 1607

Back on topic, with the drives split, I no longer saw the text box used to select the ISO file location in the Boot Camp Assistant.
Capto_Capture 2016-08-14_06-35-09_AM.png


Additionally it gave me this error when hitting next
Capto_Capture 2016-08-14_06-34-51_AM.png


I could hit back from the main dialog box and it would give me these choices but even with a thumb drive inserted, it would just sit there, the progress bar showing 0 seconds and about 1/2 done - just sitting there. I left it over night just for giggles and it didn't move.
Capto_Capture 2016-08-14_06-41-30_AM.png



I got around the problem by following these steps from @yjchua95 in Bootcamp Windows 10 from External Drive? thread.
Code:
Note: All commands aren't case sensitive, including pathway to files.
Type diskpart
Type list disk
Take note of the disk you want to select
Type select disk 1 (if your disk is Disk 1)
Type clean
Type convert gpt (stop at this point if you're using a drive with a Thunderbolt port)
Type create partition EFI size=100 (skip if installing in BIOS-CSM)
Type format quick fs=fat32 label=EFI (skip if installing in BIOS-CSM)
Type assign letter=S (skip if installing in BIOS-CSM)
Type create partition primary
Type format fs=ntfs quick label=W2G (or any other name you wish for label)
Type assign letter=E
Type exit

Open up File Explorer. In your C drive, create a new folder named WIN2GO.
Put the install.wim file in this folder

Back in cmd.exe:
Type dism /apply-image /imagefile:C:\WIN2GO\install.wim /index:1 /applydir:E:\ (this process will take quite a while)
Type E:\Windows\System32\bcdboot E:\Windows /s S: /f UEFI (use this one for UEFI installation)
Type E:\Windows\System32\bcdboot E:\Windows /s E: /f ALL (use this one for BIOS-CSM installation)

I'd still like to find out why I couldn't get boot camp to run proper. I know have Windows running on m internal SSD which is what I wanted, and I have OS X chugging away on a decently fast external SSD. I probably would have opted for Windows on the external SSD, but you cannot easily upgrade/install windows on a USB drive. I'm hoping now that windows is on the internal drive, I'll have no problems with upgrading.
 
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