Here you will find three tabs click on the Drag slider in front of processor to 2 and make sure that Enable PAE/NX is enabled. Now click on the settings icon given at the top of the virtual box.Choose “Use an existing virtual hard disk file” and click on the folder icon to choose the file on desktop from downloaded OS X Sierra to install Mac OS on VirtualBox. After making these entries click on Next.Also Read:How To Disable “Low Disk Space” Warning on Windows 10/7
