My Macbook Air has SSD so it automatically switched to APFS when I updated to High Sierra.
I don't recall being asked if I wanted to when I updated an older iMac to High Sierra. I was surprised to find it is Mac OS Extended and not HFS+. Either way I did a bunch of reading and APFS is tuned for SSD but I'm still wondering about updating for an HDD. I get mixed opinions on the net and Adobe support says it is OK to do so. Just wondering if it worth risking something for and older iMac with an HDD drive.
Thanks in advance.