I built Qemu on Mac OS X 10.11 El Capitan with: ./configure make make install
Successfully. And downloaded the official linux image, and ran it with the following: qemu-system-x86_64 -drive file=linux-0.2.img,index=0,media=disk,format=raw And then got the following warnings and the guest linux can not response to keyboard and freezes for a period of time, and this issue repeated forever while the guest linux was running. main-loop: WARNING: I/O thread spun for 1000 iterations Any idea? Best regards, -Aaron