The formatting external hard drive is not the same on different operating systems. You can format external hard disk with an easy way in Windows and Linux. But for Mac OS devices is a bit tricky. You may wish to use an external FireWire or USB hard drive to store your Aperture Library, referenced images, or backup your computer files. Here are some suggestions on preparing the external hard drive for best performance with Aperture. Many external hard drives come pre-formatted as FAT 32. This is a native Windows file format that can be read by Mac OS devices but is not ideal for use with Aperture.
Make sure your external hard disk is connected to your Mac device correctly and the icon on the desktop appears.
How to Format External Hard Disk on Mac Correctly
7. Now click the icon for your external hard drive in the sidebar on the left then click the Erase tab along the top of the window.
Format hard drive for Mac
8. Finally, from the Volume Format menu, choose OS X Extended (Journaled) and type a name for the hard drive. Next step, just click the Erase button the format the hard drive for Mac OS Devices.
Format hard drive for Mac and Windows and Linux
The ExFAT format will make the external hard drive compatible with Mac, Windows and Linux devices. But make sure you save remove or disconnect from the computer.
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