RainyHighSierras-MacBook-Pro:~ rainyhighsierra$ diskutil ap addVolume disk2 apfs SAM Exporting new APFS Volume 'SAM' from APFS Container Reference disk2 Started APFS operation on disk2 Preparing to add APFS Volume to APFS Container disk2 Error: -69620: Unable to get capacity info for an APFS Container or APFS Volume RainyHighSierras-MacBook-Pro. By continuing to browse the site, you agree to our use of cookies. The command below will add the APFS container to the GPT. In this video, I will be showing you guys how to fix, 'could not create a preboot volume for apfs' problem. When finished, the output from sudo gpt -r show /dev/disk0 should appear as shown below. I think I was able to successfully fix this by first installing High Sierra and booting to a USB and disabling SIP-then booting to High Sierra and running the APFS Boot ROM pkg.
Apfs container error 2 GB disk1s1 2: APFS Volume Preboot 19.
