• XCode
• brew
• ISO of MacOS 9.22 put it to ~/emulation/iso/ folder

mkdir ~/emulation
cd ~/emulation
git clone -b screamer https://github.com/mcayland/qemu qemu-screamer
cd qemu-screamer
./configure --target-list="ppc-softmmu" \
              --audio-drv-list="coreaudio"
make -j4

cd ~/emulation
mkdir data
./qemu-screamer/build/qemu-img create -f qcow2 data/macos92.img 60G

cd ~/emulation
./qemu-screamer/build/ppc-softmmu/qemu-system-ppc \
    -L ~/emulation/qemu-screamer/build/pc-bios \
    -cpu "g4" \
    -M mac99,via=pmu \
    -m 512 \
    -hda ~/emulation/data/macos92.img \
    -cdrom ~/emulation/iso/Mac\ OS\ 9.2.2\ Universal\ Inst.iso \
    -boot d \
    -g 1024x768x32 \
    -device usb-kbd \
    -device usb-mouse

Once it starts up, you will be able to run Disk Initializer to format your hard drive image. Go ahead and do that, using Mac OS HFS Extended as the file system. One partition is good.

After initializing the disk, run Apple System Restore with the Mac OS 9 Lives disk image as the source and your disk as the destination. This will take a minute to restore. Once done, shut down the emulated system (Special Menu → Shut Down).

cd ~/emulation
./qemu-screamer/build/ppc-softmmu/qemu-system-ppc \
    -L ~/emulation/qemu-screamer/build/pc-bios \
    -cpu "g4" \
    -M mac99,via=pmu \
    -m 512 \
    -hda ~/emulation/data/macos92.img \
    -boot c \
    -g 1024x768x32 \
    -device usb-kbd \
    -device usb-mouse

The script will look like app and will launch virtual machine of your MacOS 9.22 installation immediately. You must first install appify script on your system. Now create this shell script and appify it.

#!/usr/bin/env sh

~/emulation/qemu-screamer/build/ppc-softmmu/qemu-system-ppc \
    -L ~/emulation/qemu-screamer/build/pc-bios \
    -cpu "g4" \
    -M mac99,via=pmu \
    -m 512 \
    -hda ~/emulation/data/macos92.img \
    -boot c \
    -g 1024x768x32 \
    -device usb-kbd \
    -device usb-mouse

Save it as macos9, give it a executable permissions and appify it:

chmod +x macos9 
appify macos9 macos-9

The corresponding app bundle will be created. It will be easier to run virtual machine now. You can also change its icon to look more nicer.

Then you can drop it to the desktop or dock and enjoy!

• Mac OS 9 System Extensions optimization guide

It can be easily turned off by pressing CMD+Q

Press CTRL+ALT+G

To support 256 colours you will need to add a bios driver. See the EMaculation forums for instructions; it involves replacing a file in the pc-bios directory with an older version that still supports 256 colours.

You can change resolution from MacOS 9 Main menu Apple > Control Panels > Monitors.

• Original source