Barbatian
Level 1
(8 points)
Q: Bootcamp / We couldn't create... / can't return to Windows installation
Hello,
I used Bootcamp to install Windows 10. I have iMac late 2015, so I do have my Win 10 iso. image on my hard drive.
Bootcamp took it from hard drive and proceeded with actions. It restarted to windows.
I received error: "We couldn't create a new partition or locate an existing one".
I followed apple instruction:
Now I can't back to installation. I see bootcamp partition, however I do not have it as startup disk anywhere - system preferences nor while restarting mac with option key. Any ideas?
Bootcamp assistant want only to merge partitions back. I do not want to lose couple of hours again for bootcamp assistant downloading again support files.
Kind regards,
Michal
iMac (Retina 5K, 27-inch, Late 2015), macOS Sierra (10.12)
Loner T
Level 7
(24,738 points)
Please see If you see a partition alert while using Boot Camp to install Windows - Apple Support .
Disconnect all external storage, and run SMC and NVRAM reset
Reset the System Management Controller (SMC) on your Mac - Apple Support
How to Reset NVRAM on your Mac - Apple Support
Late 2015 Macs do not use a USB Installer, and the Windows ISO must be on the internal OS X drive, not on an external disk. The steps for installing Windows are documented in https://help.apple.com/bootcamp/assistant/6.0/#/bcmp173b3bf2 .
