Pro tip: If your external drive has a large volume, like mine – a 2TB Seagate Expansion. The operation will erase all data and your files will be gone for good. Important note: If you have useful files stored on the external drive, be sure to copy or transfer them to another safe place prior to formatting.
Just follow this easy step-by-step guide and you’re all set. In this post, I’m going to show you how to format your external drive for a Mac-compatible file system i.e. Apple Mac machines support a different file system. That’s all because it’s been initialized with Windows NT File System (NTFS), which is primarily for PCs. But somehow, macOS doesn’t allow you to write data to the drive. These are the defaults, so just confirm the settings.So, you just bought a new external hard drive or a portable SSD and wanted to use it on your Mac. On the right, in the Erase tab, choose to format the drive as Mac OS Extended (Journaled). To do this, launch Disk Utility and choose the destination drive in the drive list (left column). You can also sign in to your Mac as the administrator to create the bootable drive.įirst, you must partition and erase the drive so that it can be bootable. You can change it back to a standard user when you're finished. If it isn't, go to Users & Groups in System Preferences and assign Administrator to your user account.
Here's how to make one using Apple's built-in boot drive creation tool. But what if you need to partition the hard drive, wiping the recovery partition? You need a bootable OS X Yosemite installer. How do you erase your Mac hard drive and install OS X Yosemite without a startup disk? Normally the answer would be to boot into recovery mode.
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