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I followed the Apple instructions for creating an external bootable disk on my MacMini running the latest version of Catalina but when I want to use it , it said I cannot use this as the volume is not formatted as APFS but your instructions above say to format as Mac OS Extended
George Colpitts Said:
“What is the correct format for an external disk that I want to use as a bootable disk. I followed the Apple instructions for creating an external bootable disk on my MacMini running the latest version of Catalina [...]”
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For Which Operating System?
APFS is for High Sierra (macOS 10.13 and later).
So, if it is asking you to use MacOS Extended, then you may be using too old of a Mac (before 10.13) to create it, or you may be installing an older Operating System.
George Colpitts Said:
“What is the correct format for an external disk that I want to use as a bootable disk. I followed the Apple instructions for creating an external bootable disk on my MacMini running the latest version of Catalina [...]”
———-
For Which Operating System?
APFS is for High Sierra (macOS 10.13 and later).
So, if it is asking you to use MacOS Extended, then you may be using too old of a Mac (before 10.13) to create it, or you may be installing an older Operating System.
Types of disks you can use with Time Machine on Mac - Apple Support
"Time Machine can’t back up to an APFS-formatted disk."
Catalina drives should be formatted as APFS.
For macOS Catalina all drives should be formatted as APFS.
What is the correct format for an external disk that I want to use as a bootable disk
