How to Reformat Your Hard Drive Using Disk Utility on macOS or OS X

Are you having issues with your Mac's hard drive and need to reformat it? With the help of a second Mac and an external hard drive caddy, you can easily format your hard drive using Disk Utility in macOS or OS X. You can also use Disk Utility to format external drives.

Before proceeding, make sure to back up any important data from your hard drive to prevent loss. If you want to keep your files, export the data or make a backup before continuing.

If you're having trouble with your new hard drive, there are several options available. You can reformat your new hard drive using Disk Utility and then install macOS or OS X on it. Alternatively, you can use an installation disc that came with your Mac or buy a new one to boot up and install OS X on your hard drive.

Another option is to download the relevant macOS or OS X installer from Apple and create a USB installer using Terminal. You can also use Internet Recovery Mode by holding option+command+R while powering up your Mac to install macOS or OS X from the internet.

For those who are tech-savvy but unsure of where to start, there are several quick tips available. These include installing OS X on a hard drive using an installation disc, creating a bootable USB installer, and using Internet Recovery Mode to install macOS or OS X.

Additionally, you can use Disk Utility to reformat your hard drive. If you're having trouble seeing your drive, check out the troubleshooting guide for fixing external hard drives that won't show up.

To begin, ensure that your new disk or drive is installed in or connected to your computer. Follow these detailed instructions for each step:

1. Ensure the new drive is installed in or connected to your computer

If you're only cloning a single drive one time, it's likely better to use the free option. How to clone a hard drive on Windows provides all the basic functionality you'll need to simply clone one hard drive to another.

For advanced features such as quicker cloning speeds, consider paid apps like O&O DiskImage and Acronis Cyber Protect Home Office. Alternatively, recommend using Macrium Reflect Free, which is free of charge.

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