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To get around that problem, hold down the Command + R keys when you turn on your Mac and let go when the logo appears. Next, I quit Terminal, launched Disk Utility, and then was able to see the new disk in Disk drive. In Terminal I typed: diskutil eraseDisk JHFS+ NewDisk/dev/0. If you want to format your Mac's system drive, you can't do that when the Mac is running normally because the drive is in use by the operating system. Same issue with new Samsung EVO 860 in 2011 MacBook Pro. Either head to Applications > Utilities, or tap Command + Space and start typing Disk Utility.
DISK UTILITY MAC NEW HARD DRIVE HOW TO
Give the drive a descriptive name and leave the default settings: OS X Extended format and GUID partition map. Heres how to format a drive if you are planning to use it with a Mac.
![disk utility mac new hard drive disk utility mac new hard drive](https://i.stack.imgur.com/Ymyk3.png)
Usually, you'll want ExFAT, which is the default for the MacOS. How to Format a Hard Drive For Both Windows and Mac. Select the drive you want to format and then choose “Erase.”Ĥ. At the top of the window, click "Erase."ĥ. In the pop-up window, choose the file system you want to use.