Mar 12, 2019 Q: How hard is it to reformat the hard drive on a Mac computer? A: It’s very easy. There is only one rule that you need to keep in mind when reformatting a drive. You cannot reformat a volume when you are currently booted to an operating system on. May 09, 2017 How To Use External Hard Drive on Mac Without Formatting As we have said earlier, OS X El Capitan or macOS Sierra cannot write to an NTFS (Windows) formatted drive, but it can read from it. There is a however a “driver” available which will allow your Mac to write to NTFS-formatted drives. Oct 27, 2017 Now your external drive has been formatted to be fully compatible with Apple MacOS, and you can edit, read, and write files to it as you want. How to Partition an External Hard Drive on Mac. If you want to create multiple partitions on your external hard drive (in fact, you should for better file organization), here’s a step-by-step guide. Mar 22, 2012 The best ways to format an external drive for Windows and Mac. Compare the different options for formatting an external hard drive to work with Windows and Mac.

So, you just bought an external hard drive or a portable SSD 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 Data Rescue 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.

Most External Hard Drives Are Initiated with NTFS

During the last several years, I’ve used several removable drives, including a 500GB WD My Passport, 32GB Lexar flash drive, and a few others.

Three weeks ago, I bought a brand new 2TB Seagate Expansion to backup my MacBook Pro before I updated to the latest macOS, 10.13 High Sierra (also see those High Sierra issues I encountered).

When I connected the Seagate to my Mac, the drive icon showed up like this.

How To Format A Hard Drive For Mac Exfat

When I opened it, the default content was all there. Since I wanted to use it on Mac, I clicked the blue logo with the text “Start_Here-Mac”.

It brought me to a webpage on Seagate’s site, where it clearly indicated the drive was initially set up to work with a Windows PC. If I wanted to use it with Mac OS or Time Machine backup (which is my intent), I’ll need to format the drive for my Mac.

I then right-clicked the external drive icon on Mac desktop > Get Info. It showed this format:

Format: Windows NT File System (NTFS)

What is NTFS? I’m not going to explain here; you can read more on Wikipedia. The problem is that on macOS, you can’t work with files saved on an NTFS drive unless you use a paid app Paragon NTFS for Mac.

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.

Step 2: Highlight your external drive and click “Erase”.

Make sure your drive is connected. It should show up on the left panel under “External”. Select that disk and click the “Erase” button, the one highlighted in red in the screenshot below.

Step 3: Select “Mac OS Extended (Journaled)” in Format.

A new window will pop up asking which file system you’d like to format the external drive to. By default, it’s the Windows NT File System (NTFS). Select the one shown below.

Pro tip: If you want to use the external drive for both Mac and PC, you can also select “ExFAT”. Learn more about the differences between these file systems from this thread.

By the way, you can also rename your external drive.

Step 4: Wait until the erasing process is complete.

For me, it took less than a minute to format my 2TB Seagate Expansion.

You can also check to see if the format was successful. Right-click on the icon for your external drive on Mac desktop, then select “Get Info”. Under “Format”, you should see text like this:

Congratulations! Now your external drive has been formatted to be fully compatible with Apple MacOS, and you can edit, read, and write files to it as you want.

How to Partition an External Hard Drive on Mac

If you want to create multiple partitions on your external hard drive (in fact, you should for better file organization), here’s a step-by-step guide:

Step 1: Highlight your drive and click “Partition” in Disk Utility.

Open the Disk Utility app and highlight your external hard drive. Make sure you select the disk icon right under “External”. If you select the one below it, the Partition option will be greyed out and become unclickable.

Step 2: Add partitions and allocate volume for each one.

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.

Once you hit “Apply”, a new window pops up asking for your confirmation. Take a few seconds to read the text description to make sure it reflects what you intend to do, then click the “Partition” button to continue.

Step 4: Wait until it says “Operation successful.”

How To Format A Hard Drive For Mac Mojave

To check whether the operation is really successful, go to your Mac desktop. You should see multiple disk icons show up. I chose to create two partitions on my Seagate Expansion — one for backup, the other for personal use. You can find more info in this post: How to Backup Mac to an External Hard Drive.

That wraps up this tutorial article. I hope you find it helpful. As always, let me know if you have any issues during the formatting or partitioning process.

Dear Mac user, is your computer performing really slow these days? Has it been infected by a virus that you just couldn't get rid of? Or maybe you are planning to sell your system? There may be various reasons why you might opt to format your hard drive, but regardless of the case, you might find yourself at one point in time having the need to format your hard disk drive.

Formatting a hard drive on Mac is not a difficult thing, but do you know how to do it securely? In this post, you'll learn all things about formatting hard drive on Mac. You can read it and check whether all things have been done before formatting Mac hard drive. Now, let's drive to the right section as follows:

Why Processing Hard Drive Format on Mac?

If you are a person that installs lots of applications on a daily basis, be it out of curiosity or pure need, then you surely saw that computer performance tends to decrease tremendously after some time. This happens because the operating system tends to clutter with lots of unimportant information that you’ll most likely never use and which just sits there. After a few months the performance decrease can become significant and that will make you find a solution for this problem. The best solution in this case is surely to format the hard drive, of course.

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How To Reformat A Hard Drive For Mac