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I'm trying to avoid APFS conversion. For this reason I ejected SATA drive and connected it through USB2SATA converter. When I try to install Mojave, this drive can not be selected with error "You may not install to this volume because the computer is missing a firmware partition."
View attachment 344147
Does the target drive have an EFI partition? (eg. target partition created by partitioning with Disk Utility as GPT?)
$ diskutil list /dev/disk2
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *60.0 GB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_HFS SandboxSSD 59.7 GB disk2s2
Yes, it has:
Code:$ diskutil list /dev/disk2 /dev/disk2 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *60.0 GB disk2 1: EFI EFI 209.7 MB disk2s1 2: Apple_HFS SandboxSSD 59.7 GB disk2s2
My goal was to avoid APFS conversion.You should be installing to an internal device, not external.
My goal was to avoid APFS conversion.