getting error when running bootcamp on Sierra

Question

When running Bootcamp-Can&#x27;t get past the second screen that gives me a pop-up error "startup drive needs to be one partition formatted OS X extended (journaled). Workaround attemps- I&#x27;ve repartitioned my native drive and also used an external HD, both formatted OS X extended (partitioned).I tried using bootcamp years ago and ran across similar show stopping issues. I thought I would try it again to run WinBlows 10. So frustrating!

Loner T · Answer

From OS X Terminal, please post the output ofdiskutil listApple does not officially support Windows on external disks. Microsoft supports it under Windows Enterprise only.

WhoDoYouLove · Answer

Thank you for your speedy reply Loner! 🙂Last login: Sun Sep 25 10:50:50 on consoleSmacks-MBP:~ smack$ diskutil list/dev/disk0 (internal, physical):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      GUID_partition_scheme                        *121.3 GB   disk0   1:                        EFI EFI                     209.7 MB   disk0s1   2:          Apple_CoreStorage Untitled                57.4 GB    disk0s2   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3   4:                  Apple_HFS OSXRESERVED             7.9 GB     disk0s4   5:           Windows Recovery                         471.9 MB   disk0s5   6:                        EFI NO NAME                 104.9 MB   disk0s6   7:         Microsoft Reserved                         16.8 MB    disk0s7   8:                  Apple_HFS untitled                54.4 GB    disk0s8/dev/disk1 (internal, virtual):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                            Untitled               +57.0 GB    disk1                                 Logical Volume on disk0s2                                 840F113F-1A5A-4805-8B90-AF88D8DD738A                                 Unencrypted/dev/disk2 (external, physical):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      GUID_partition_scheme                        *2.0 TB     disk2   1:                        EFI EFI                     209.7 MB   disk2s1   2:                  Apple_HFS Untitled                2.0 TB     disk2s2   3:                 Apple_Boot Recovery HD             650.0 MB   disk2s3/dev/disk3 (disk image):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                            Boot Camp              +2.8 GB     disk3Smacks-MBP:~ smack$

Loner T · Answer

Last time you attempted a Windows installation, there was external storage connected to the Mac. This results in the partition layout that you currently have. 1. Disconnect all external storage. You do not need to use any external install media, only a Windows ISO on the internal disk.2. Merge all partitions after Apple Boot (disk0s5-disk0s8) into a single FAT32 partition.     diskutil eraseVolume jhfs+ BC1 disk0s5     diskutil eraseVolume jhfs+ BC2 disk0s6     diskutil eraseVolume jhfs+ BC3 disk0s7     diskutil eraseVolume jhfs+ BC4 disk0s8     diskutil mergePartitions jhfs+ BCMP disk0s5 disk0s8     diskutil eraseVolume fat32 BOOTCAMP disk0s53. Run the following two procedures.     Reset the System Management Controller (SMC) on your Mac - Apple Support     How to Reset NVRAM on your Mac - Apple Support4. Run BC Assistant, remove the BOOTCAMP Partition. If you still see OSXRESERVED, please post back.5. Run BCA and start the Windows Installation process again.

WhoDoYouLove · Answer

Same error message - The startup disk cannot be partitioned or restored to a single partition.Lastest after your directions-/dev/disk0 (internal, physical):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      GUID_partition_scheme                        *121.3 GB   disk0   1:                        EFI EFI                     209.7 MB   disk0s1   2:          Apple_CoreStorage Untitled                57.4 GB    disk0s2   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3   4:                  Apple_HFS OSXRESERVED             7.9 GB     disk0s4   5:       Microsoft Basic Data BOOTCAMP                471.9 MB   disk0s5   6:                  Apple_HFS BC2                     104.9 MB   disk0s6   7:                  Apple_HFS BC3                     16.8 MB    disk0s7   8:                  Apple_HFS BC4                     54.4 GB    disk0s8/dev/disk1 (internal, virtual):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                            Untitled               +57.0 GB    disk1                                 Logical Volume on disk0s2                                 840F113F-1A5A-4805-8B90-AF88D8DD738A                                 Unencrypted

Loner T · Answer

Please run the following commands diskutil eraseVolume jhfs+ BC1 disk0s5diskutil mergePartitions jhfs+ BCMP disk0s5 disk0s8diskutil listCan you post the output of each command as well?

WhoDoYouLove · Answer

Sorry, I didn&#x27;t follow your instructions. Here&#x27;s the latest. Same error when trying to run Bootcamp./dev/disk0 (internal, physical):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      GUID_partition_scheme                        *121.3 GB   disk0   1:                        EFI EFI                     209.7 MB   disk0s1   2:          Apple_CoreStorage Untitled                57.4 GB    disk0s2   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3   4:                  Apple_HFS OSXRESERVED             7.9 GB     disk0s4   5:       Microsoft Basic Data BOOTCAMP                55.0 GB    disk0s5/dev/disk1 (internal, virtual):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                            Untitled               +57.0 GB    disk1                                 Logical Volume on disk0s2                                 840F113F-1A5A-4805-8B90-AF88D8DD738A                                 Unencrypted

Loner T · Answer

We are going to erase and merge disk0s5 into disk0s4.diskutil eraseVolume jhfs+ BC2 disk0s5diskutil mergePartitions jhfs+ BCMP disk0s4 disk0s5diskutil eraseVolume fat32 BOOTCAMP disk0s4Post the output ofdiskutil listRun BC Assistant and try to remove the disk0s4 partition (do not use Disk Utility).

WhoDoYouLove · Answer

It worked. I&#x27;m reinstalling Win 10 now. I&#x27;ll post back with any issues and/or virtual HUGS!!! 🙂Peace and Love

Loner T · Answer

Please do not connect any external storage till Windows is fully installed and you have a log in/account.

WhoDoYouLove · Answer

So far so good! ((((((((())))))))

Loner T · Answer

Please back up OS X, Windows and create a Windows System Restore point, once you are happy with the Windows installation.

WhoDoYouLove · Answer

Will do. Now how do I unsubscribe, I&#x27;m getting hammered with emails from this thread.

Loner T · Answer

Click on the &#x27;Following&#x27; toggle button.

WhoDoYouLove · Answer

Thank you!!