When the installation finishes, you will now have a fully functional Android operating system that you can start and stop at will from your Mac desktop. After the virtual machine has been created, click on the green Start button on Virtualbox to start the machine, it will now request the file location of the Android iso file you downloaded, select it and confirm, then your Android installation will start. You do not need to worry because the software uses default settings that match your system, just keep clicking next. You will be prompted to choose a RAM size and after that you will create a harddisk drive for the virtual machine. After installing Virtualbox, launch it and click on New, then fill in the details, giving the new virtual machine a name, then click next. Navigate to download a modified version of the Android operating system that can be run on intel based chips (hence the x86). The first step is to download and install it on your Mac.
For our purposes here, we will use it to install Android on macbook or Mac as the case may be.
Virtualbox is a free virtualization software from Sun micro-systems that is available for Mac, Windows and Linux and you can use it to install any operating system of your choice that it supports.
