- #Could not unmount disk macbook air how to#
- #Could not unmount disk macbook air for mac#
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- #Could not unmount disk macbook air mac#
#Could not unmount disk macbook air mac#
To check whether the operation is really successful, go to your Mac desktop. Step 4: Wait until it says “Operation successful.” 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. Once you hit “Apply”, a new window pops up asking for your confirmation. After that, you can rename each partition and define a file system for it. You can do that by clicking the small white circle and dragging it around. Then allocate the desired volume to each partition. What you need to do next is click the add “+” button to increase the number of partitions on your external disk. Located on the left is a big blue circle with the name of your external drive together with its volume size. Step 2: Add partitions and allocate volume for each one.Īfter clicking “Partition”, you’ll see this window. Now you should be able to click the “Partition” button. Step 1.3: Hit Erase, wait until the process is complete.
#Could not unmount disk macbook air mac os#
Also, under Format, make sure you have selected Mac OS Extended (Journaled). Step 1.2: Under Scheme, select Apple Partition Map. I’m using my new flash drive as an example.
#Could not unmount disk macbook air how to#
Here’s how to make the “Partition” button clickable. That’s because your external drive hasn’t been formatted/erased to a Mac-compatible file system yet. Update: many of you reported that the “Partition” button is always greyed out. If you select the one below it, the Partition option will be greyed out and become unclickable. Make sure you select the disk icon right under “External”. Open the Disk Utility app and highlight your external hard drive. Step 1: Highlight your drive and click “Partition” in Disk Utility. 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: How to Partition an External Hard Drive on Mac Under “Format”, you should see text like this:Ĭongratulations! 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. Right-click on the icon for your external drive on Mac desktop, then select “Get Info”. You can also check to see if the format was successful. Step 4: Wait until the erasing process is complete.įor me, it took less than a minute to format my 2TB Seagate Expansion. You may also want to rename your external drive here.
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Pro tip: If you want to use the external drive for both Mac and PC, you can also select “ExFAT”. By default, it’s the Windows NT File System (NTFS). Step 3: Select “Mac OS Extended (Journaled)” in Format.Ī new window will pop up asking which file system you’d like to format the external drive to. Click on this icon on the top left corner and select “Show All Devices”. Note: if your hard drive is not showing on the left panel, it must have been hidden. Select that disk and click the “Erase” button, the one highlighted in red in the screenshot below. It should show up on the left panel under “External”. Step 2: Highlight your external drive and click “Erase”. 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. They might be different if your Mac is on a relatively new macOS version. Note: The tutorial and screenshots below are based on an older version of macOS. How to Format an External Drive for MacĪs explained above, you need to format your drive from NTFS to Mac OS Extended. The problem is that on macOS, you can’t work with files saved on an NTFS drive unless you use a third-party app which usually costs money. What is NTFS? I’m not going to explain here you can read more on Wikipedia. It showed this format: Format: Windows NT File System (NTFS) I then right-clicked the external drive icon on Mac desktop > Get Info. 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. 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. Since I wanted to use it on Mac, I clicked the blue logo with the text “Start_Here-Mac”. When I opened it, the default content was all there. When I connected the Seagate to my Mac, the drive icon showed up like this. I bought a brand new 2TB Seagate Expansion to backup my MacBook Pro before I updated it to the latest macOS. Most External Hard Drives Are Initiated with NTFSĭuring the last several years, I’ve used a few external drives, including a 500GB WD My Passport, 32GB Lexar flash drive, and a few others.
#Could not unmount disk macbook air for mac#
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