rename efi boot windows 10 bootcamp os x imac

you would likely get more success here

Boot Camp

I have renamed BC volumes on W8.1. I do not have a W10 installation handy. Can you run the equivalent process in W10? You will need to use Disk Management.

Can you post the output of diskutil list from the OS X side? Your C: shows BOOTCAMP.

The boot ability is derived from the MSR not the MSD. As a test, please rename disk0s4 to an arbitrary name using diskutil renameVolume.

The syntax is

diskutil renameVolume

Usage: diskutil rename[Volume] MountPoint|DiskIdentifier|DeviceNode newName

The new name is subject to file system-specific naming restrictions.

Ownership of the specified volume may be required.

diskutil renameVolume disk0s4 <SomeName>

Does the renameVolume generate any errors? What does diskutil list show?

You cannot mount disk0s4 without some additional steps. There is not much which is useful in disk0s4. Can you see Bootcamp volume in OSX Finder?

From Use Windows 10 on your Mac with Boot Camp - Apple Support, your 2011 iMac is not officially supported by Apple for W10 upgrade, even though M$ may say otherwise.

I updated my previous post with supportability of your iMac model. There is a reason to see the EFI Boot. It may be easier to show first rather than to explain.

From OSX Terminal,

sudo mkdir -p /Volumes/EFI

sudo mount -t msdos /dev/disk0s1 /Volumes/EFI

cd /Volumes/EFI

ls -lR

Copy and paste each command in the Terminal. The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.

Hi there, I have tried searching countless of forums but I am still unable to find the solution to this problem. Does anybody know how to resolve this issue?

Thanks.

Have you installed W10 on a 2011 Mac using EFI Boot?

Hi Loner T,

Thank you for your reply. I thought I should describe what I did, should it help someone out there.

I had been trying to install Bootcamp W10 on a 2012 Retina Macbook Pro running El Capitan. I used a 160gb HDD to attempt to install windows 10 and after bootcamp installation loaded and the mac restarted, I was left with a black screen.

Seeing that there was no way to go about using bootcamp to install it, I merged the partition and re-partitioned an unformatted empty space using command line. I proceeded to install windows via EFI Boot. I managed to install windows but everytime I selected the boot option, it would appear as "EFI Boot" instead of "Windows". The Bootcamp drivers on Windows did not work properly too.

The main reason why bootcamp installation did not work for me was because I was using an external harddrive instead of a flash drive. I believe the Mac has issues booting into the EHD after the Bootcamp installation restarts. (Saw this on another thread, thanks again Loner T!) Everything worked smoothly once I got my hands on a flash drive.

With regards to this thread, I did not manage to rename the initial EFI Boot partition.