当我键入代码sudo docker-machine create --driver virtualbox default
来创建新的虚拟机时。它无法工作。这里是信息:docker-machine:预创建检查时出错:“退出状态126”
xxxMacBook-Pro:~ xxx$ docker --version
Docker version 1.12.0, build 8eab29e
xxxMacBook-Pro:~ xxx$ docker-machine --version
docker-machine version 0.8.0, build b85aac1
xxxMacBook-Pro:~ xxx$ sudo docker-machine create --driver virtualbox default
Running pre-create checks...
Error with pre-create check: "exit status 126"
请帮我弄清楚这一点。