



In my case, that setting has been disabled forever, because the guest OS (W2K) predates the arrival of x86 virtualization extensions/support I don't think that's the true culprit either though > What resolved the issue for me was turning off the hypervisor, Virtual Machine -> Settings -> Processors and Memory -> Enable hypervisor applications in this virtual machine. I also have a lot of trouble identifying which window is on top (focus) or not – the difference in brightness/contrast is so negligible that I feel like I'm suddenly visually impaired. I cannot fathom why I now have to live in perpetual loss of the lower left and lower right corners of my VM screens. On the one Mac mini where performance is excellent, performance is still great when I assign all 6 did you get most out of – enabling "Disable Side Channel Mitigations" or disabling "Enable hypervisor applications in this virtual machine"? For what it's worth, I cannot agree more with your other sentiments about Big Sur. My host has 32 GB RAM, and I've experimented with assigning low or high amounts with no success. My host has 6 physical cores, while my VMs have between 2 and 4 processor cores assigned to them.

I can't turn off VBS because I need it for my for your input. I have two identical Mac minis (2018) and the issue is only present on one of them. because it forces me to migrate off Apple, once and for all - staying with the VMs is, at least for me, more important than staying with MacOS. maybe the transition to M1 is a good thing after all. may seem cute to the at Apple who insisted on new sounds, but is a major disruption to my mental workflow.) (Random example: getting used to totally different sound effects. (And yes, the lower left and right corners of my VMs are clipped.) (And yes, the vertical pixel height of my VMs required adjustments.) I can still tell a slowdown (mostly via muscle memory). After upgrading to Big Sur, VMs ran at something like 1/50th speed, i.e super slow startup, login, anything.ĭisabling the side channel mitigations seemed to help - now it feels like maybe 95% of prior performance, i.e. Ps: I am happy to post a video of 10.10 running to show how slow it is.Similar story for me. I am using VMWare workstion 11 and virtualization is enabled in my UEFI I want to use OSX 10.10 to be able to use XCode 6, so I really would like to fix this sluggishness problem. I downloaded both VMWares off the internet, I even didnt build myself. Now, I have my Mac OS X 10.10 also in a VMWare running from my SSD drive. It runs smooth! The boot is fast, around 1 minute. With that being sad, I have a Mac OSX 10.7 VMWare in my USB drive, 2 cores and 3GB memory allocated. I wanted to use Mac on VMWare for the time being till I get some time to do more reading on how all this works. I have not yet adventured myself on trying to install Mac on my PC.
