Hi! Is it possible install High Sierra on a Fusion Drive disabling APFS, so having the old HFS+ system? When installing High Sierra, there is a chekbox to uncheck? Do yuo think that when APFS came out to Fusion Drive (when?), we need to reformat again the Mac or HFS+ to APFS will be a normal upgrade without data lose? Or do you think it is better to separate my hard drive, 1 partition SSD + 1 normal?