APFS Fusion Drive Issue!

[ExclusiveMac]

I want to install High Sierra on an iMac with Fusion Drive HDD, so i formated as a APFS, i didn't know that is not yet supported.
I want to reformat in macOS Journaled like before, but now i cannot see only the APFS options to format.
What i have to do to reformat again?
Also after i restart now appear the keyboard and mouse detection graphics, i turn on both but nothing happen.

Thank you in advance!

 

[Ebenezum]

Easiest way is to follow these instructions: https://beta.apple.com/sp/betaprogram/apfsfusion

Make sure you backup any important information, this will erase everything!

You might want to wait until future update includes APFS Fusion Drive support, without APFS there is relatively little benefits in High Sierra... And some very annoying bugs like WindowServer taking absurd amount of processor time, METAL 2 bugs etc.

As for when it will happen only Apple knows, my guess is probably 10.13.3 or .4.