How To Downgrade APFS To HFS+ / Mac OS Extended File System
Here’s how to downgrade from APFS back to HFS+ / Mac OS Extended file system on your Mac such as a MacBook or an iMac.
Apple’s HFS+ file system has been at the heart of the Mac for years, and was even used on iOS devices until very recently, too. With the arrival of APFS however, Apple ushered in the replacement for HFS+ that many have been crying out for. Heralded as a modern file system, built with modern SSD storage in mind, APFS did away with some of the inherent problems that have plagued HFS+ for so long.
It is not all sunshine and roses though, with APFS not yet compatible with things like FileVault 2 or Time Machine. For that reason, rolling back from APFS to HFS+ is something you may need to do. That process is of course eminently possible, if a little convoluted. You will need to be relatively comfortable with the macOS app, Terminal, in order to make this happen, but we’ll give you the commands you need to make the magic happen. Pay attention and you’ll be absolutely fine.
So with that said, let’s start changing an APFS disk to an HFS+ one, shall we?
Step 1: Launch Terminal on a Mac with the disk you want to convert already attached and mounted.
Step 2: Execute the following command – diskutil list. The output of that command will list Apple_APFS as the GUID partition name. You need to make a note of the IDENTIFIER assigned to that partition. We will use “disk2s0” as an example
Step 3: Next, you need to run a command that will destroy that partition and all of its contents. Make sure you type carefully!
diskutil apfs deleteContainer /dev/disk2s0
Note: If the command returns an error, simply start again from Step 1, and the error would be less likely to return.
Step 4: Now run the following command again to make sure the partition is now listed as Apple_HFS.
Step 5: Now we just need to initialize the container for use with HFS+ by using the command:
diskutil eraseDisk JHFS+ Untitled /dev/disk2s0
When that is complete you will be left with an empty file system, converted to HFS+, with the disk named “Untitled”.