Well... For the 1st time I would also public post my thanks not only to KGP!
Thank's to You folks I convince myself to change MB from Gigabyte X299 Aorus Game 9 to Gigabyte X299 Designare.
I also updated-changed my ssd from Samsung 960EVO 1TB to Samsung 960PRO 2TB.
Well... The change was definitively WORTH!!!
Previously on Gigabyte Gaming 9 all worked more or less fine, but I had 3 small annoying problems:
1) slow boot times (3-5min)
2) At each boot I had to reconfigure the Monitor preferences, because strangely everytime the system booted with the "duplicate monitor" flag setted.
3) 2-3 Times a day my Parallel Windows 10pro Virtual Machine "stopped" to function and I had to reboot not the whoole system, but the Virtual machine.
.... Now all this 3 annoying issues are definitively gone!!! ;-))
Beside this I can only recommend the Rulebreaker01 EFI, because from the early beginning, so starting from the -from scratch- installation of MacOSX 10.13.3 (17D2047) on my new ssd...the machine behaved totally as one native iMac...NO issues at all, all the installation worked very smoothly,