Thank you, that’s truly wonderful to know. I don’t think I am even going to bother installing PT on my imac pro, nor Logic, so will just leave the machine as it arrives with 10.13.6 and go straight to Cubase… I might even wait till 9.5.4 is out since I can use my laptop in the meantime and have a fresh install for the first time with 9.5.4 
Cheers!