RealVision Posted February 23, 2017 Share Posted February 23, 2017 I am trying to install macOS Sierra. It boots the installer and runs the first phase fine. However, in second phase when I select "Boot macOS install" it boots up, starts installing and gets an error "Unable to unmount volume for repair." Any ideas? Hp Envy dv6 Intel Core i7 (Ivy Bridge) 8 GB RAM Intel HD Graphics 4000 700 GB Hard Disk previously I had el Capitan and worked perfectly, I used the same config.plist, kext from my el capitan but still no luck. any help will be much appreciated. 1 Link to comment Share on other sites More sharing options...
MaLd0n Posted February 23, 2017 Share Posted February 23, 2017 use it to create usb installer http://www.insanelymac.com/forum/files/file/559-flash-drive-maker/ after, install clover, kexts and config ur .plist 1 Link to comment Share on other sites More sharing options...
RealVision Posted February 23, 2017 Author Share Posted February 23, 2017 use it to create usb installer http://www.insanelymac.com/forum/files/file/559-flash-drive-maker/ after, install clover, kexts and config ur .plist hi, thanks for the reply, I don't have access to a mac. I already formatted my drive(el Capitan) so now I left with no Mac at all. any other suggestion? 1 Link to comment Share on other sites More sharing options...
MaLd0n Posted February 23, 2017 Share Posted February 23, 2017 virtual machine u format ur hd in mac os extended journaled and guid partition table? Link to comment Share on other sites More sharing options...
RealVision Posted February 23, 2017 Author Share Posted February 23, 2017 virtual machine u format ur hd in mac os extended journaled and guid partition table? yes I formatted to os extended journaled and guid partition. just like what I did for el capitan, yosemite and maverick back then. Link to comment Share on other sites More sharing options...
Sphinx777 Posted March 17, 2017 Share Posted March 17, 2017 Same issue here. Not happened before (I did a new installation). Link to comment Share on other sites More sharing options...
Sphinx777 Posted March 22, 2017 Share Posted March 22, 2017 I solved here: 1. I installed MacOS first and left a space for install Windows 10 afterwards on HDD 2. Using a Linux distro I´ve used Gparted and create a new NTFS partition on space I left for Windows 3. I´ve installed Windows without formatting the partition created by Gparted Link to comment Share on other sites More sharing options...
Nonta72 Posted July 5, 2017 Share Posted July 5, 2017 I had the same problem, I fixed mine by creating the installation USB different way.The problem I believe was due to the createinstallmedia tool. If the USB is in fact created with that tool, the installer divides the installation process into two. First, it copies the installation files to the HDD partition (that part creates problem), and then it reboots from that partition to install the files and eventually create the Recovery partition. The problem is that it for some reasons tries to unmount the partition it has booted from, which is obviously not possible; hence, it fails. The root problem probably has much to do with the partitions structure. In my case, I used MiniTools Partition Manager to migrate my Windows installation from my HDD to the new SSD drive. It could have been due to that, although MSR partition is also known to cause problems in some situations. The partition structure was as follow: - ESP = EFI Partition - MSR = Microsoft Reserved (culprit, too?) - Win10 = Windows drive - Sierra = New partition created for Sierra - Macintosh HD = El Capitan drive (already installed and working) - RecoveryHD = El Capitan recovery drive. Solution: Use the "Restore BaseSystem.dmg" method. It's the vanilla way and it doesn't divide into two parts. Everything is done on the single step. Link to comment Share on other sites More sharing options...
gabrielsousa Posted November 17, 2017 Share Posted November 17, 2017 @Nonta72 can you tell me the vanilla method ? Link to comment Share on other sites More sharing options...
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