There are two ways to create these images: Using Disk Utility or using the hdiutil and asr commands in the terminal. You will need an additional volume or a mounted shared drive with enough space to create the image. This image will be compressed and will make recovery fast and easy. This how-to will show you how to make an image of one hard drive and store it on another drive. It’s an indispensable tool – one which could save your data and prevent a lot of headaches down the road.
If you’re into preventative maintenance and creating backups like we are, you’ll need to create a Mac start up disk image. AirPort Apple Apps Backups Developer Education Email Hardware Internet iPad iPhone Mac Music Network Photos Security TV Weekend Wonk
