qemu on macos, VM can't ping ip on bridge0

[Gary Allen]

I installed qemu on macos and use a tap device in the vm. Below are my steps.

1. install qemu

   brew install qemu

2. install tuntap, after installation, I can see tap devices in /dev/tapX

   brew install tuntap

3. create a bridge

   sudo ifconfig bridge0 create

4. configure ip address on bridge0

   sudo ifconfig bridge0 192.168.122.1/24

5. sudo ifconfig bridge0 up

6. start my qemu vm (which is centos), and log in to the vm, mannually configure the static ip address as 192.168.122.101/24, gateway is 192.168.122.1.

   sudo qemu-system-x86_64 -m 2048 -vga virtio -show-cursor -usb -device usb-tablet -drive file=centos-temp.qcow2,if=virtio -accel hvf -cpu host -net nic -net tap,ifname=tap0,script=no,downscript=no

7. after the vm starts, I can see a tap0 in the output of ifconfig, and I add tap0 to bridge0

   sudo ifconfig bridge0 addm tap0

however, after theses steps, I cant's ping 192.168.122.1 in my vm, and neither can I ping 192.168.122.101 in my mac host.

What am I doing wrong?