UTM 5.0.8 (128): host STOP access during input capture without release keys

[aprilffools1411-blip]

I’m preparing a supervised test using a windowed QEMU ARM64 Linux VM on macOS with UTM 5.0.8, build 128.

Is there a supported physical way for a single operator to invoke that specific VM’s host Stop control while keyboard and mouse input remain captured, without using the capture-release key combination?

I need a host-controlled stop that does not depend on guest cooperation or successful keyboard release. I cannot assume that moving the pointer to the toolbar, switching apps or using another mouse works during capture.

Please identify the documented mechanism, prerequisites and limitations. If no such physical route exists in this version, please confirm. I am seeking guidance only and will not test an undocumented gesture.