disc repair volume could not be unmounted high sierra

Re-open Disk Utility and select the internal drive and format it as “Mac OS Extended”.

Select the internal drive and click Erase.

Press and hold the Power button and in the same time command + R until you see the Apple logo. Note: We must tell you that this method is the most effective in order to fix “could not create a Preboot Volume for APFS install” error. We will walk through this methods step by step. There are two possible solutions or methods in our case when you are not able to reinstall macOS High Sierra and you are getting the “could not create a Preboot Volume for APFS install” error message, and they are: delete the partition or volumes on your Mac or install Sierra on Internet Recovery Partition. And when you are trying to reinstall the High Sierra using Recovery Mode, it doesn’t work because of the Apple File System partition type. The new system APFS has improved the security also it is faster and more compatible with SSD, but the problem occurs with the OS X that is not compatible to it and also with macOS that is older than High Sierra. The main reason that you cannot install the preboot is caused by something (that Apple hasn’t figured it out yet) wrong with the APFS or Apple File System, the new file system that Apple is introducing in High Sierra to replace the 20-year-old file system or HFS+. This error means that the Preboot Execution Environment (PXE) cannot be installed on the APFS volume.

Error Messageįirst of all, we should explain what does it mean when your Mac is saying that “could not create a Preboot Volume for APFS install”. If you are getting this error message “could not create a Preboot Volume for APFS install” when you are trying to reinstall macOS High Sierra, in this article we will show you why this error occurs and how to fix it. This error is not very common with the users and appears only if the user is trying to erase their Macs and reinstall macOS High Sierra.

Disc repair volume could not be unmounted high sierra