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Click the Erase button at the top of the window.If you don’t see it, go to View > Show All Devices. Select your new hard drive from the sidebar.How do I use Disk Utility to reformat my hard drive? Otherwise, you can skip this step and do it from the Utilities page during the macOS or OS X installation. If your Mac doesn’t work, you can do this using a second Mac and an external hard drive caddy.

It’s easy to reformat your hard drive using Disk Utility in macOS or OS X. Disk Utility can be used to format external drives as well. If you don’t want to lose data from your hard drive, export the data or back it up before continuing. You may need to reformat your new hard drive before installing macOS or OS X on it. macOS could not be installed, how-to fixįormat your new hard drive for macOS or OS X.

Install cd for mac how to#

How to create a macOS Catalina USB installer.

Factory reset MacBook Air and other Macs with macOS.

How to downgrade from macOS Mojave to macOS High Sierra.

Install cd for mac install#

Or use the OS X installation disc that came with your machine - or buy a new one - to boot up and install OS X on your Mac’s hard drive.

Install cd for mac download#

Download the relevant macOS or OS X installer from Apple, then use Terminal to create a USB installer you can boot up from.

Install macOS or OS X from Internet Recovery Mode, which you can boot into by holding option+command+R while your Mac powers up.

If you’re tech-savvy but don’t know where to start, use these Quick Tips to point you in the right direction for getting macOS or OS X on your drive:

How do I install OS X on my hard drive using an installation disc?.

How do I use a bootable USB installer to install macOS or OS X?.

How do I create a bootable USB Installer?.

Which version of macOS or OS X should I create an installer for?.

Create a bootable USB installer for macOS or OS X.

How do I use Internet Recovery Mode to install macOS or OS X on my hard drive?.

Install macOS using Internet Recovery Mode.

How do I use Disk Utility to reformat my hard drive?.

Format your new hard drive for macOS or OS X.

You can now quit Terminal and eject the volume.

When Terminal says it's finished, the volume will have the same name as the installer you downloaded, such as Install macOS Big Sur.

After the volume has been erased, you may see an alert stating that Terminal would like to access files on a removable volume.

Terminal displays the progress as the volume is being erased.

When prompted, type Y to confirm that you want to erase the volume, then press Return.

Terminal doesn't show any characters as you type your password.

Install cd for mac password#

When prompted, type your administrator password and press Return again.* If your Mac is using macOS Sierra or earlier, include the -applicationpath argument and installer path, similar to the way this was done in the command for El Capitan. Sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/ MyVolume -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app Sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/ MyVolume Sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia -volume /Volumes/ MyVolume Sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/ MyVolume Sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/ MyVolume If it has a different name, replace MyVolume in these commands with the name of your volume. These assume that the installer is in your Applications folder and MyVolume is the name of the USB flash drive or other volume you're using. Type or paste one of the following commands in Terminal.Open Terminal, which is in the Utilities folder of your Applications folder.Connect the USB flash drive or other volume that you're using for the bootable installer.