Upgrading Macs to High Sierra which have Fusion Drives

[honestone]

I just saw this on www.maccentral.com:

https://www.macworld.com/article/32...r-fusion-drive-imac-to-macos-high-sierra.html

It might be best to seer away from upgrading to High Sierra for a while longer, and it seems the same caution might be wise if one has a traditional HDD as their internal drive. I guess if one takes all the necessary precautions and does a clean, fresh, "virgin" installation of High Sierra (along, of course, with having a VERY recent backup of one's prior system), it might be fine. I am fortunate in that both of my internal drives on my Macs are SSDs, and except for one minor software issue with Quicken 2007, High Sierra is working fine for me.

 

[Greenman]

When you install macOS High Sierra on the Mac volume of a solid-state drive (SSD) or other all-flash storage device, that volume is automatically converted to APFS.Fusion Drives, traditional hard disk drives (HDDs), and non-Mac volumes aren't converted.