Launch Disk Utility Mac (Located under Finder –> Utilities –> Disk Utility).

You can download OS X latest version (.app format) from iTunes

Download the Mac OS X file first, and make sure it is in.

You can also use external hard disk, and create a separate partition to make Mac OS X Installer Getting Ready to create a Bootable OS X Installer Note : Please make sure, in process of making Mac Installer, the drive will be formatted.

So learn the easiest way to deal with both the format. app format, but if you are trying to install the older version, and found it from the internet, it would be in. If you have downloaded Mac OS X latest version from the app store, it would be in. To perform this task, you will have to make a bootable USB Stick or Flash Drive, and we will tell you how. Boot from it, format your Mac’s Hard Disk/Flash Storage, and then reinstall OS X. If you are trying to make a fresh installation of OS X on your Mac or just want to Factory Reset MacBook Pro, MacBook Air or even iMac, the better way to do is make a bootable flash drive or USB Stick for Mac.

Mac make bootable usb for dell