Reinstall MacOS Error

Suggest re-booting using the Cmd+R+Option combination

Be certain to have a reliable and active internet connection preferred via an Ethernet Cable Connection as it is more stable and reliable than Wifi

It will present options >> Disk Utilities >> View >> View ALL attached Drives. 

Choose the Upper Most Drive ( not the volumes indented and list below ).

The drive normally is called Apple Media or Apple SSD - that is the drive to Erase and format as APFS with the GUID Partition Map. 

Once that is done >> backup out of Disk Utilities and choose " install macOS "

Hopefully, it will offer the latest version of macOS this computer Qualifies to Run >> Ventura 🤞 ?

Aside, macOS 10.14 Mojave was the first version of macOS to fully able to use and understand the newer APFS / GUID Partition Map 

If the drive has been formatted while using macOS 10.14 Mojave, it may have been using a Older version of APFS / GUID

aashnaunadkat8 wrote:

isConvertibleToAPFS: was called on disk3, an APFS disk.

disk3 is not convertible to APFS: This volume is not formatted as Mac OS Extended (Journaled).

FYI, macOS 11.x+ (Big Sur+) require the destination volume to be APFS. The macOS 10.13 to 10.15 installers will

automatically convert the HFS+ file system (aka MacOS Extended) to APFS. Unfortunately the later macOS installers no longer automatically convert the destination volume to APFS (personal experience).

[the same disk errors then go from disk3 to disk20, and then the following error message is repeated several hundred times]

All the other volumes are just virtual volumes for the installer. You cannot modify any of them. The only drives you can modify are listed as physical drives and any volumes located on a physical drive.

@PRP_53 has the instructions for properly erasing the whole physical internal SSD.

PRP_53 wrote:

Aside, macOS 10.14 Mojave was the first version of macOS to fully able to use and understand the newer APFS / GUID Partition Map 

FYI, macOS 10.13 High Sierra was the first OS which could be installed onto an APFS volume. Technically macOS 10.12.6 Sierra (perhaps even 10.12.4, but I'm not certain about the latter) can understand the APFS file system in order to mount & read an APFS volume. I don't know whether Sierra is able to write to an APFS volume. AFAIK, Sierra is unable (not allowed) to repair an APFS volume.

If the drive has been formatted while using macOS 10.14 Mojave, it may have been using a Older version of APFS / GUID

AFAIK, It should not matter which version of the APFS file system is being used for the later versions of macOS.

It may matter which version of macOS & Disk Utility is used to repair an APFS volume. I'm not sure whether an older version of Disk Utility is allowed to repair an APFS volume containing a newer version of the APFS file system since the older versions of the app may not understand any new features/changes with the newer version of the APFS file system. I know that I would never do so even if it were allowed.

PRP_53 wrote:

Got that

If not mistaken and correct me if so.

macOS High Sierra on a SSD Drive could convert to APFS versus a Spinner would remain macOS Extended ( HFS+ )

Thank for the heads-up though 😎

I believe that was the case with macOS 10.13 High Sierra. I'm not sure about Mojave.

I know that there was a way to force the macOS installer to use HFS+ without converting to APFS as well, but I don't know if that option was removed with a later version of that installer.

FYI, macOS 10.13+ when using Disk Utility to erase the drive as APFS, the process will start out erasing the drive as HFS+ followed by converting the HFS+ volume to APFS. IIRC, this still occurs as late as macOS 10.15 and I believe even some later versions of macOS.

Also, I believe the macOS 10.15 Catalina installer is the last one which will automatically convert an HFS+ macOS boot volume to APFS automatically during an upgrade to Catalina. I believe the macOS 11.x+ installers no longer automatically convert an HFS+ boot volume to APFS. The macOS 11.x+ installers may start to install to an HFS+ volume, but will end up failing at some point.

HWTech wrote:

PRP_53 wrote:

If not mistaken and correct me if so.

macOS High Sierra on a SSD Drive could convert to APFS versus a Spinner would remain macOS Extended ( HFS+ )

I believe that was the case with macOS 10.13 High Sierra. I'm not sure about Mojave.

Actually after reading this again, I think the default was to use APFS. However, people found a way to have the macOS 10.13 High Sierra installer use HFS+ instead without having to convert the file system to APFS.

Got that

If not mistaken and correct me if so.

macOS High Sierra on a SSD Drive could convert to APFS versus a Spinner would remain macOS Extended ( HFS+ )

Thank for the heads-up though 😎

👍

Your are Welcome 2x

Let us not forget my learned colleague @HWTech who had a hand in this solution