This answer explain starting macOS Time Machine backups to My Passport and External USB Drives.END Time Machine can be used with most external USB hard drives as well as many Network devices. For external drives, the device must be formatted as HFS+ in order to be used with Time Machine WD Network drives such as can also be used with Time Machine. Please refer to for assistance in configuring a WD Network Drive with Time Machine Click on the links below to go to backup or restore section of the article and Time Machine is supported on macOS versions listed below. macOS 10.14 (Mojave). macOS 10.13 (High Sierra).
Hi everyone, I have a portable external hard drive (WD My Passport Essential SE) and my computer is a 2009 MacBook Pro (using Snow Leopard OSX, 10.6.8). And my drive keep on unmounting for no reason. It ranges from 5 to 60 minutes, and it just unmounts.
macOS 10.12 (Sierra). macOS 10.11 (El Capitan). macOS 10.10 (Yosemite).
macOS 10.9 (Mavericks). macOS 10.8 (Mountain Lion). macOS 10.7 (Lion). macOS 10.6 (Snow Leopard).
macOS 10.5 (Leopard). How to Backup To perform a Time Machine backup on macOS, connect the drive to your Mac and make sure it is formatted for Time Machine backups Critical: The instructions in the article below are designed to help repartition and format a hard drive.
This process is Data Destructive and cannot be undone. Once the process begins, ALL THE DATA ON THE DRIVE WILL BE LOST!