APFS disks may not be used as bootable install media

03. APFS offers a lot of advantages for SSD performance and durability, as well as encryption for any type of drive.

02. Disk Utility in macOS High Sierra or later can erase using either the newer APFS (Apple File System) format or the older Mac OS Extended format, and it automatically chooses a compatible format for you.

Once the firmware's been updated, though, APFS imaging should work, i.e.

If Scheme is available, select GUID Partition Map. If you use Disk Utility to erase an APFS volume and format it HFS+, you’ll find that the old APFS container sticks around. About APFS and Mac OS Extended . File system formats available in Disk Utility on Mac. spinning disks) with APFS at present (this may change in the future with APFS updates). Open Disk Utility for me If your system drive is solid state, the installer will convert from HFS+J to APFS in both a fresh install scenario and an update scenario. I stick with HFS+ for all non-bootable system drives. Formatting failed. Preparing to backup the data onto another drive, so the external SSD can be reformatted with APFS and I can install High Sierra Beta from scratch. If your Mac is using AFS+, select Mac OS Extended (Journaled) from the format list. taking an existing 10.13 install, wiping the drive, and laying a replacement 10.13 image on top. If you have more than one external drive with the same name, you will need to rename the drive you are using as a bootable installer now. As you already know, macOS High Sierra includes a new file system APFS. Those are not really "used" on a frequent basis and literally for clone usage only. Delete Your APFS Partition the Right Way. It is better to use HFS+. Disk Utility on Mac supports several file system formats: Apple File System (APFS): The file system used by macOS 10.13 or later. All previous steps and approaches I tried to resolve the APFS issue July 5, 2017 01. Mainly media and working SSDs. Mac OS Extended: The file system used by macOS 10.12 or earlier. It is controlled by the ConvertToAPFS option in /macOS Install Data/minstallconfig.xml, which can be controlled by using … Have several system drive clones that go to portable HDDs, setup through CCC that are APFS volumes. Superduper v. 3.1.2 can back up and make bootable HFS+ clones on external hard discs from APFS - formatted internal SSDs.

Fortunately, there a ways around this automatic conversion. The macOS installer says that you may not install to this volume because it is part of an Apple RAID.

I have done this several times without problems. If your Mac is using APFS, select APFS from the list of options. Click Erase. Formatted the external SSD volume & tried to reformat it directly as APFS. Only attached to the system when the clone is going to be performed. MS-DOS (FAT) and ExFAT: File systems that are compatible with Windows.

Geoff. But it’s not backwards compatible with older versions of OS X or macOS. How to choose between APFS and Mac OS Extended. It is not recommended to format hard disks (i.e.

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