This is a destructive process so you want to be certain that the disk identifier you are using is the correct one.Ĥ. Next we will write zeros across the entire disk. You will see output that looks like this Forced unmount of all volumes on diskn was successful At the command prompt enter the following without the quotes and press return "diskutil unmountDisk force diskn" where you REPLACE diskn with the name of the disk found in step #2 Our next step is to ensure that this disk is unmounted.ģ. Typically this will identified as diskn where n represents a number. You are looking for the disk that does not have an HFS+ or APFS partition already on it. This will provide a list of disks on your system. You will see output that looks something like this /dev/disk0 (internal, physical):Ģ: Apple_APFS Container disk1 121.1 GB disk0s2 /dev/disk1 (synthesized):Ġ: APFS Container Scheme - +121.1 GB disk1ġ: APFS Volume Macintosh HD 105.9 GB disk1s1Ĥ: APFS Volume VM 3.2 GB disk1s4 /dev/disk2 (external, physical): At the command prompt enter "diskutil list" without the quotes and press return. Note that this work must be done in Terminal with an administrator level account.Ģ. The steps to make your drive APFS are documented in Arthur's post but I will list the steps here.
Mac users actually WANT to use APFS not NTFS. MacOS can read from NTFS but does not write to it without extra software. Most external drives that comes ready to go have been prepared by the manufacturer to be immediately used on Windows due to pure market penetration. This is actually a very good thing, unfortunately it chokes when dealing with an NTFS prepared volume. What has changed is that in High Sierra, Apple has finally delivered the long promised successor to HFS+ in with a new file system APFS.
This is obviously erroneous and is due to a bug in MediaKit, Apple's way of dealing with media. What happens is that Disk Utility reports that there is not enough space on your new blank drive. I commended him on his post and do so again, because Apple still has not addressed the issue as of this writing. His article is very comprehensive and well worth reading for the technically minded. Something in High Sierra broke this completely and while Apple has not fixed this yet, Arthur Gareginyan over at posted a fix back in October. Up until High Sierra, all you had to do was launch Disk Utility and partition the external disk as HFS+ Journaled. I've recently been approached by a number of folks who like using portable hard drives for travel and for their photo libraries for their laptops who have been unable to prepare the drives with an Apple file system and partition.
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