id summary reporter owner description type status component version resolution keywords cc guest host 18108 Very poor performance on iMac 2017 5K macjacke IiMac 2017, 27 inch, 5K, 32 GB RAM. It is impossible to work properly on virtual machines. The virtual machines are Windows 10, Windows 7 and Windows XP. All systems run badly. defect new other VirtualBox 5.2.20 iMac Retina 5K Windows Mac OS X