I have decided to abandon the notion, only because I believe that my Mac isn't powerful enough to actually drive the system, thanks to the underpowered integrated graphics on my machine. I can't rely on macOS-on-macOS emulation with Parallels Desktop 17.1.4 (51567). Reducing transparency, reducing motion and increasing contrast in the guest OS (Settings > Accessibility > Display) actually tends to help by making the performance of Metal emulation better by making less demands on the GPU, but these tricks only go so far if an application makes great demands on the GPU, the emulation falters, and causes applications to start displaying malfunctions, or get terminated (if the system survives the problems in the first place). However, there are some things which tend to ease the congestion on the GPU. Just recenltly, Visual Studio Code for Mac has stopped working (it was working at some point a few months ago, but a recent update has now broken this), and Microsoft Teams has always been unrealiable, both because the window contents cannot be rendered properly in the guest OS. I have to concede that I cannot make much use of macOS as a guest OS on my Mac, only because the larger apps like to malfunction or crash in the guest OS. For now, our team continues to work on supporting both Parallels and Apple hypervisors and continues collaborating with Apple on implementing the rest of Parallels. I don't know whether the Metal support that Parallels Desktop/Apple system software offer either requires a larger, more powerful GPU, or is just plain broken. The old Parallels Desktop design using Parallels system extensions is shown on the left, and the newly-invented Parallels Desktop 16, using macOS Big Sur APIs, is shown on the right. Running macOS Monterey on macOS Monterey on a MacBook Pro with Intel Iris 550 graphics is pretty abysmal.
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