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#Formating mac hard drive for osx install how to#
#Formating mac hard drive for osx install mac os#
#Formating mac hard drive for osx install install#

#Formating mac hard drive for osx install install#

If your Mac came with Lion, the Install OS X option will download and install the latest minor version of Lion. In the subsequent window, open the Format dropdown and choose Mac OS.

Quit Disk Utility and choose Install OS X. In order to install macOS, youll need an external drive with at least 12GB of.Open Disk Utility, select the Macintosh HD volume, open the erase tab, and press the erase button. This applies only to people who use an iMac with a Fusion Drive, consisting of a hard disc and an SSD acting as one disk.

#Formating mac hard drive for osx install how to#

If others search for how to do a normal erase and reinstall, erase the main OS X partition (like Macintosh HD) instead of the whole drive: If you have one of those Macs, you erase the whole drive from the recovery partition, and it is not in fact possible to reinstall OS X without starting up in Internet Recovery mode after that, you can probably use Recovery Disk Assistant instead. Some older Macs support a recovery partition but not Internet Recovery mode. Part 1: How to Format Hard Disk on Mac a) Startup your Mac and press the Option+ + R keys to boot into Recovery. But if you restart the Mac, it will start up in Internet Recovery mode, which means that it downloads a disk image of the recovery system from Apple's servers, and you can then install OS X on the empty drive. When I did this with my MacBook Air, I restarted it after I had erased the drive, so I don't know if it is possible to reinstall OS X from the recovery partition without relying on Internet Recovery mode. It also erases the hidden recovery and EFI partitions.

#Formating mac hard drive for osx install mac os#

Open Disk Utility, select the drive (not the Macintosh HD volume), open the erase tab, set the format to Mac OS Extended (Journaled), and press the erase button.

Start up from the recovery partition by holding command-R.

With the drive selected in Disk Utility, click. Open Disk Utility, select the drive (not the Macintosh HD volume), open the erase tab, set the format to Mac OS Extended (Journaled), and press the erase button. Here’s a quick process outline: Install all the apps from your external hard drive (all your serials and licenses in 1Password will come in handy). Assuming the installation went fine, the next process is to restore everything.

If the drive is shown in the list of devices, you should be able to initialize it. Use your OS X USB Key or recovery partition to reformat and reinstall OS X. Once booted from the CD, look in the Utilities folder on the CD for Drive Setup. Your Mac can boot from the CD with no Hard Drive at all. Click Erase and OS X will format the drive. format it in \ Drive Setup and then install on it. You can erase the drive and reinstall OS X using the recovery system: These will format the drive in OS X's HFS+ filetype so it will be compatible with Time Machine.