I had a Windows 10 VM on a Mac Book Pro with an SSD and was very pleased with how speedy it was compared to my previous Mac. I have now replaced that Mac Book Pro with an new iMac with a Fusion Drive and it seems to be running very slowly as it did before. Is there really such a speed difference when using a Fusion Drive? I'm going to do some RAM re-allocation and change the HD size, but I don't know if this will help at all. Thanks for any suggestions.