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. Sep 26, 2018 Need to format an external hard drive for Mac and Windows. Windows PC and Mac use different filesystems. The Windows uses NTFS and Mac uses HFS. They are incompatible with each other. So, if you want to use an external hard drive on both Windows and Mac, you need to format it to a filesystem that is compatible with Windows PC and Mac.
Looking for simple straight forward helpon how to format your Seagate hard drive for your Mac?
Because you just want to get your Mac’sbackup done.
Or you need your drive to free up space onyour Mac.
Or download that mass of photos becauseyou don’t want to pay for any more cloud storage. Then you can have your photosat home. Without the worry of someone breaking into your cloud storage.
Read on for your simple, easy to followinstructions.
Want a high level view? Here is whatyou’re going to do when you format your Seagate External hard drive for yourMac.
1. Log in.Plug your Seagate drive into your Mac.
2. Spotlightsearch Disk Utility. Press return.
3. Pickyour Seagate drive under External on the left.
4. Click onErase at the top.
5. Giveyour Seagate drive a name. Pick your Format from the menu.
6. PickGUID Partition Map for Scheme.
7. ClickErase bottom Right to Format.
How to Format a Seagate Hard Drive for Mac![]()
Just one moment.
Before you go ahead and format your Seagate externalhard drive on your MacBook or iMac. Ask yourself if there any files on thereyou want.
Because formatting means you won’t be able to get toany of those files on the drive once you have formatted it.
If you know there are files on your Seagate externaldrive then copy them somewhere safe first. Then you can go ahead and format.
An example of the kind of files you may have on your Seagate drive are the ones Seagate put on there when you buy.
Paint online for mac. They are the files that allow you to register your Seagate external hard drive for warranty. And download some of Seagate Technology’s own software tools.
The Simple and Easy Steps to Formatting your SeagateDrive on Your Mac1. Log into your Mac. And Plug in your Seagate Drive.
Your Seagate external hard drive unless it’s one of Seagate‘s desktop drives. Takes it’s juice, its power from your Mac, along its USB cable.
And that means you’ll need enough battery power inyour MacBook Pro or Air to drive the Seagate drive.
Even if you think your Mac has enough battery power. Plug your Mac in. Because you won’t want your Mac’s battery running out of power. And doing that part way through formatting your Seagate drive.
Formatting a desktop Seagate external drive? Then plugin its power cable to power it up.
Depending on the Seagate drive you have you may needan adaptor cable to plug into your Mac’s USB port.
Not sure what you might need? Then go over to my document here that walks you through the different generations of Macs. Their USB ports and the type of USB adaptor you need to look for.
When you’re plugged in and powered up your Mac willshow the Seagate’s drive icon on your desktop.
If for some reason you can’t see it. Take a look atyour finder window preferences.
Open a finder window. And go to your preferences.
Make sure the boxes show ‘Hard Disks’ and ‘ExternalDisks’ on your desktop are checked.
2. Spotlight Search Disk Utility.
You’ve free software on your Mac. It’s part of your Mac’s operating system. And that software will format your Seagate drive for you. That software is called Disk Utility.
You find it by doing a Spotlight search.
Click on the Spotlight icon at the top of your Mac’sdesktop screen.
Then type in ‘Disk Utility’ and press the return key.
Double click on Disk Utility to start up the program.
3. Pick your Seagate Drive Under External.
Once Disk Utility has started up you’ll see its pop upwindow.
On the left hand side of the pop up window you’ll seea list.
Disk Utility shows you in this list your attachedinternal and external drives.
Your Seagate external drive will be listed under‘External’.
Click on your Seagate drive in the list. The yellow arrow on the photo below shows youwhere.
It’s important that you pick your Seagate drive at theright level. Or your formatting may not work.
You may need to expand the list to see the levels. Youdo that by clicking on the down arrow to the left of the drive icon on thelist.
No List? Nothing under external? You’ll need to changeyour view.
At the top left of your Disk Utility pop up window you’llsee View.
Open up the view menu. On the view menu pick to toshow all devices. That will show thedrive and the volume.
4. Click on Erase at the Top.
At the top of your Disk Utility pop up window you’llfind the Erase button. Click on that.
Only click on the Erase button after you’ve clicked onyour Seagate drive at the top level.
This will take you to the next pop up window. There you’ll set up how you want to format your Seagate hard drive for your Mac.
5. Give your Seagate hard drive a Name
Now you put in the details for your drive’s format.
Choose and put in a name on the menu where it saysName.
This is the name your Mac will show on your desktopunder the drive’s icon.
Next pick the format.
You have a few options here.
Then pick Mac OS Extended (Journaled)
This is the format you choose when you want to to copyand paste your files. Or drag and drop your files to your Seagate hard drive.
This is the format your Mac wants to use when you do a Time Machine Backup.
Then pick ExFAT. You can drag and drop your files. Copy and paste your files.
But you can’t use an ExFAT formatted external harddrive for a Time Machine backup.
Don’t choose FAT32 unless you have to. It’s an oldMSDOS file system.
How To Format Hard Drive For Mac And Pc Use
FAT32 is less robust and has file size restrictions.You wouldn’t choose it unless you had to. Say if you were using your Seagate hard drive for a device that willonly talk to FAT32.
The new Apple file system is for Solid State Drives. It can’t be used for a Time Machine backup. But you could choose it if you were formatting a Seagate SSD drive.
Pick your Format option.
You choose from a list that you open up using theup/down arrows at the end of the Format field.
6. Pick GUID Partition Map for Scheme
The next option you choose when formatting your Seagate hard drive for Mac is Scheme.
Pick GUID Partition Map.
How To Format Hard Drive For Mac Without Erasing
This is the scheme your Mac likes to use. It doesn’t matter if you’ve picked Mac OS Extended (Journaled) or an ExFAT format or APFS. You Pick GUID Partition Map.
7. Click Erase Bottom Right
Set your formatting options. And when you click on theErase button at the bottom right of the window you’ll kick off the formatting.
In a few moments the formatting of your SeagateExternal Hard drive on your Mac will be all done.
When Disk Utility is finished you can get rid of yourDisk Utility window.
And in a few moments your Mac will show your Seagate external hard drive on your Mac’s desktop.
Eject your Seagate Hard Drive When You’re Finished
After you have copied what you want to your Seagatedrive. Or used it for a Time Machine backup. Be sure to Eject your Seagatedrive before you pull your USB cable.
Your Mac keeps stuff in its memory while you’re usingyour Seagate drive. Ejecting tells yourMac to copy everything in memory down to your Seagate.
And then it’s safe to plug out your USB cable.
You Eject the drive my hovering your cursor over thedrive icon on your Mac’s desktop. Right click. And choose Eject from the menuthat comes up.
In a couple of moments your Seagate’s drive Icon goesfrom your desktop and you take out the drive’s USB Cable.
And that’s it you’ve learnt how to format a Seagatehard drive for Mac.
YouTube Video Showing Formatting a SeagateHard Drive for Mac
Would you like to see a video showing youhow to format your Seagate drive? Take a look at this video. In total it’snearly 13 minutes.
But if you’re only formatting your Seagatedrive for Mac, you’ll see all you need to know in the first 3 minutes.
Seagate External hard Drive How to Setup on Mac
Video Credit: Tech & Design
Related Documents
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.
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.
Mac and cheese for 50. Step 1: Open Disk Utility.
How To Format Hard Drive For Mac And Pc
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.
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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.”
Internal Hard Drive For Macbook Pro
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.
How To Format Hard Drive For Mac Os X Install
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.
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