I've had issues with multiple vcpus previously. But I've tried that recently and it worked fine with the fix: https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg03864.html.
And I've checked your command, no issues. Could you please try to install qemu from my tap and check if it's gone? brew tap roolebo/virt brew install roolebo/virt/qemu --HEAD -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1798451 Title: HVF linux on OSX hangs 2nd time started after adding socket Status in QEMU: New Bug description: Robs-MacBook-Pro-2:~ robmaskell$ qemu-system-x86_64 --version QEMU emulator version 3.0.0 Host: MacOS - 10.13.6 Model Name: MacBook Pro Model Identifier: MacBookPro14,3 Processor Name: Intel Core i7 Processor Speed: 2.8 GHz Number of Processors: 1 Total Number of Cores: 4 L2 Cache (per Core): 256 KB L3 Cache: 6 MB Memory: 16 GB Guest OS: Elementary Linux Loki 0.4.1, patched up to date Command used to start QEMU: qemu-system-x86_64 \ -name ElementaryLokiDev \ -machine pc,accel=hvf \ -cpu max \ -smp cpus=2,sockets=2,cores=1,threads=1,maxcpus=2 \ -numa node,nodeid=0 \ -numa cpu,node-id=0,socket-id=0 -numa cpu,node-id=0,socket-id=1 \ -m 8G \ -vga vmware \ -hda e4.qcow2 Symptoms: Started without the -smp / -numa commands to install the OS, then added -smp / -numa and the machine boots and lscpu reports extra cpu as expected. Restart VM and it hangs on startup. Remove -smp / -numa and machine starts again. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1798451/+subscriptions
