Does High Sierra need APFS?

Does High Sierra need APFS?

macOS High Sierra: Startup SSD volume must be APFS; other drives can wait. But it’s not backwards compatible with older versions of OS X or macOS. You’re required to upgrade any SSD startup volume when you install High Sierra—there’s no way to prevent it.

How do I convert Mac to SSD?

Step 1: Format the SSD

1. Connect the SSD to your Mac using the SATA-to-USB cable.
2. Go to Applications > Utilities and open the Disk Utility.
3. Click on the SSD icon, followed by the Partition tab and select “Partition 1” from the Partition Layout.
4. Click on Options and select GUID Partition Table in the next window.

Can you use APFS on a external hard drive?

Apple File System is optimized for Flash/SSD storage, but can also be used with traditional hard disk drives (HDD) and external, direct-attached storage. You can use Disk Utility to convert external volumes from HFS+ to APFS format.

Is there an option to convert to APFS?

There has never been an option to convert to APFS. Early on I tried to convert using Disk Utility in the Recovery volume. That stopped the drive from booting and I had to do a clean install. In PB5, the option in Disk Utility to convert to APFS is greyed out. Some online sources have noted that APFS does not work on HDD-only Macs.

Why does APFS not write over the original file?

It can’t write the edits over the original file, like the HFS Extended volume does, because then the changes would exist in both the original file and its copy—remember that the extents table for the file and its copy point to the same location on the disk. So that would be really bad. Instead, APFS creates a new extent for each of the edits.

Can a High Sierra iMac read both APFS and HFS?

High Sierra can read both APFS and HFS+ without issues. So you don’t need to upgrade any drives you don’t want to. But if you are asking if it’s ok to use an iMac with HFS+ with an external with APFS then yes. That works fine.