Thank you for this. I was able to update to 26040.1000 using your hardware settings. I was also able to switch to Parallels hypervisor after updating but rebooting will sometimes fail with the Parallels hypervisor. (I prefer to use the Parallels hypervisor because I use an app called Core Temp that tracks my CPU temps on my guest VM and, with the Apple hypervisor, the temps are inaccurate whereas with the Parallels hypervisor, they are accurate when compared to iStat Menus on my host). I am curious - what made you switch from NVMe to Sata for your HDD? That seemed to be a significant workaround.