![]() ![]() One of these is a preboot volume that doesn't get erased when you just erase the main APFS system partition and this causes the installer to give that error message recreating a completely blank APFS container should resolve the issue. ![]() "Macintosh HD" is actually an APFS partition inside of an APFS logical volume management container that contains a few other (normally hidden) partitions. More technically, what's going on is that Disk Utility's GUI is really dumb and there's arguably a bug in the macOS installer. (c) re-run the installer and things should work fine. But it wouldn't let me do that because it was in use. I thought that what I was supposed to do next was delete the Macintosh HD partition too. If you're using the Disk Utility GUI to do this, make sure "Show all Devices" is selected in the View menu - this will allow you to actually erase the entire drive. I tried to followed instructions for a factory reset: went into Recovery Mode (cmd-R), entered Disk Utility, deleted the Macintosh HD-Data partition. ![]() (b) actually erase / repartition the drive (what you did was just erase one partition on the drive not repartition the drive itself which results in this "feature" / bug of High Sierra installs) - GPT/GUID partition table and APFS container would work (you can also create a Journaled HFS+ partition but this will just get converted to APFS anyway by the installer). (a) make sure you're booting to internet recovery (not the onboard recovery partition) Is there any way i can take it to an apple store so they fix it?
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