![]() So, you just bought an external hard drive and wanted to use it on your Mac. But somehow, macOS doesn't allow you to write data to the drive. That's all because it's been initialized with Windows NT File System (NTFS), which is primarily for PCs. Apple Mac machines support a different file system. In this post, I'm going to show you how to format your external drive for a Mac compatible file system i.e. Mac OS Extended (Journaled). Just follow this easy step-by-step guide and you're all set. 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. The operation will erase all data and your files will be gone for good. You could use a recovery program like to retrieve them, but the odds of recovery vary. Pro tip: If your external drive has a large volume, like mine -- a 2TB Seagate Expansion -- I highly recommend you also create multiple partitions. I'll also show you how to do that below. All three of the operating systems you mention (including Windows.) do, in fact, support multiple file systems and the capability to automagically recognize which filesystem has been used. Of course you might have to install a file system driver that might or might not be installed by default. Outlook for mac setup office 365. How to Format an External Drive to Work with Mac (from NTFS to Mac OS Extended)? Note: The tutorial and screenshots below are based on macOS Sierra 10.12.5. They might be different if your Mac has a different version. Step 1: Open Disk Utility. The quickest way to do this is a simple Spotlight search (click the search icon on the upper right corner), or go to Applications > Utilities > Disk Utility. After clicking 'Partition', you'll see this window. Located on the left is a big blue circle with the name of your external drive together with its volume size. What you need to do next is click the add '+' button to increase the number of partitions on your external disk. Then allocate the desired volume to each partition. ![]() You can do that by clicking the small white circle and dragging it around. After that, you can rename each partition and define a file system for it. Step 3: Confirm your operation. Apple's Time Machine is the go-to backup method for many Mac users. Apple's puts some users in a lurch over how they will be continuing to back up their Macs using Time Machine when Time Capsule is no more. Luckily there a few sans Time Capsule. Old usb steering wheels for mac osx. However, not everyone will be able or willing to use a spare Mac as a backup location or attach yet another external drive or even buy an expensive Time Machine capable NAS. There do exist other hacked solutions that will allow you to use any networked location — including a Windows share. Although this method cobbles together various utilities to make it function (and as such could be subject to points of failure), you can easily set up Time Machine to use a non-approved location for backups. • • • • • • The problem The issue that makes Time Machine more difficult in terms of options for backup locations is that it requires use of Apple's proprietary HFS+ filesystem.
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