Using the normal qemu start string, add a -prom-env "boot-args=-s". /cygdrive/f/VMs, Emulators, Simulators/Qemu/Mac OS X/Mac OS X 10.5 (Leopard)/Mac OS X 10.5 (Leopard) Desktop/Mac OS X 10.5.1 (Leopard) Desktop qemu-start-mac-os-x-10-5-1.sh #!/bin/bash sHD=mac-os-x-10-5-1-system-disk.qcow2 sName=$(basename "$(pwd)") "qemu-system-ppc.exe" \ -name "${sName}" \ -L pc-bios \ -boot c \ -M mac99,via=pmu \ -cpu g4 \ -m 2048 \ -prom-env "boot-args=-s" \ -prom-env "vga-ndrv?=true" \ -prom-env "auto-boot?=true" \ -drive file="$sHD",format=qcow2,media=disk \ -netdev tap,id=mynet0,ifname=mytap3451 \ -device sungem,netdev=mynet0,mac=52:54:00:12:34:51 \ -usb \ -device usb-mouse...