Open Disk Utility by following Applications Utilities Disk Utility. To install macOS on an external hard drive: 1. Now that you have the installation files ready on your Mac, you can move them to your USB drive for future use. After that, you’ll be able to rock the new freshly installed OS X. Requires a Mac (2012 or later) with OS X Yosemite and an Apple TV (3rd generation rev A, model A1469 or later) with Apple TV software 7.0 or later. Download Os Utilities For Mac - Best Software & Apps Mac OS X El Capitan. Create bootable USB drive with Mac Disk Utility. It can take a while, might want to play some Angry Birds for a while or grab a beer!Īfter the reinstall, you or the new owner will need to go through the setup process, transfer files, connect to WiFi…etc. You’re Mac will restart a few times automatically while everything is erased and reinstalled. Now you can kick back and wait while OS X reinstalls. If you only have one drive, it will be selected for you automatically.īefore OS X installs, you’ll need to log in to your Apple Account. Now agree to the terms of service for the software license.Īfter that select the hard drive you want to install OS X on. Click Continue at the bottom, and on the message that comes up, click the Continue button. I have made several rescue boot media disks on several different brands of USB drives and I get the same thing every time. Next you’ll get the OS X Mountain Lion screen. I was able to create the Rescue Boot Media and can start the MBP 13 (Yosemite) with the USB Rescue Boot Media but once the OSX Utilities screen comes up, I get a Spinning Pinwheel. Reinstall Apple OS X Mountain LionĪfter that’s done, go back to OS X Utilities and this time highlight Reinstall OS X and click Continue. This does a similar job of securely erasing your drive as DBAN for Windows. If you want to be extra secure, select Security Options, then select 7-Pass Erase, which meets the US Department of Defense 5220-22 M standard. That will erase all data and reformat the hard disk. Select the local drive and click the Erase tab, Format should be set to Mac OS Extended (journaled), the click the Erase button. Start your Mac and hold down the Command + R key combination. In OS X Yosemite, those apps give you new ways to do some of the things you do most. Note: I started by selling my iPad 3, and if you’re selling yours, check out my article on how to erase your data and reset it.
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