If you’ve been wondering what APFS is, and how it affects your use of your Mac, over on TidBits there’s a good article by Jeff Carlson that covers the relevant details.

If you’re running macOS High Sierra and you have an SSD (and you really should have an SSD if you value your own time) then it’s quite likely that you’re already running APFS and may not have even noticed it.

Apple have performed quite a seamless transition between their ageing HFS+ file system to their next generation APFS file system with very few issues. Of all the upgrades to High Sierra that I have performed, there have only been issues on a handful of Macs, and of these issues I can not attribute any of them to the HFS+ to APFS conversion.

Microsoft pulled off a similar feat when they transitioned people from FAT to NTFS in the late 90’s and early 2000’s and it was similarly a straightforward process.

Read on for the lowdown on why APFS is a good thing and what it can do for you: What APFS Does for You, and What You Can Do with APFS – TidBITS