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I have a bootable monterey disc but I notice the hard drive is divided into an OS volume and a data volume. When I erase the disc in disc utility do I erase both? After that, I just boot to the thumb drive and install monterey? It's been a while since I did this. Thanks. (I plan to do this on two intel macs, a 2015 27" intel Imac and a 2019 Macbook Pro. Both are currently running Catalina).
iMac 27″, macOS 10.15
" Scorched Earth Method "
This method will WIPE ALL Data and there is No Recovery - Period.
>> Only works on Intel Based Apple Computer <<
1 - Shutdown computer and disconnect all external drive Except the newly created Bootable Installer.
2- Restart and immediately hold the OPTION key until the Startup Manager appears and choose the USB Drive.
3 - It will present options >> Disk Utilities >> View >> View ALL attached Drives.
4 - Choose the Upper Most Drive ( not the volumes indented and list below ).
5 - 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. This applies to macOS 10.14 Mojave and above.
6 - Once that is done >> backup out of Disk Utilities and choose install macOS.
7 - Follow the prompts and it may automatically reboot several time.
8 - Upon a final reboot - Setup Assist will present with the newer version of macOS.
" Scorched Earth Method "
This method will WIPE ALL Data and there is No Recovery - Period.
>> Only works on Intel Based Apple Computer <<
1 - Shutdown computer and disconnect all external drive Except the newly created Bootable Installer.
2- Restart and immediately hold the OPTION key until the Startup Manager appears and choose the USB Drive.
3 - It will present options >> Disk Utilities >> View >> View ALL attached Drives.
4 - Choose the Upper Most Drive ( not the volumes indented and list below ).
5 - 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. This applies to macOS 10.14 Mojave and above.
6 - Once that is done >> backup out of Disk Utilities and choose install macOS.
7 - Follow the prompts and it may automatically reboot several time.
8 - Upon a final reboot - Setup Assist will present with the newer version of macOS.
Erase the top level of the drive.
Thank you for your detailed response. I really appreciate it.
You are welcome and thank you too
How to erase everything and do a clean install
