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- Mac and Linux use write caching on pretty much all drives, and will let you eject any drive through your file manager. Windows, however, is a bit more mysterious on this front.
- Jan 11, 2016 How to Eject a SD Card, USB Key or USB Drive. Go to Finder in your dock (bottom of your screen, furthest to the left). In the window that opens, scroll until you see the Devices section. Your SD Card/USB Key, or USB Drive is the one with the little “Eject” button next to it. In the example below the drive is called “NO NAME”.
I can even see the device 'mounted' with the command 'systemprofiler SPUSBDataType' that lists all USB devices connected with the computer. I need this device to be used in a Ubuntu Virtual Machine so I need to be able to 'disconnect' this device from the host (mac os) and open in the VM. Mar 12, 2020 Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions. Learn more For more information about the createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal.
When finished using a USB flash drive connected to your computer, don't pull it out of the USB port. Instead, eject it using the eject option provided by your OS (operating system).
NoteThe steps on this page can also be used to safely eject other devices connected to a computer via USB, including smartphones.
Mac icloud settings. You can use iCloud Drive on Mac computers (OS X 10.10 or later), iOS devices (iOS 8 or later), iPadOS devices, and Windows computers with iCloud for Windows (Windows 7 or later required). You must be signed in to iCloud using the same Apple ID on all your computers and devices.
When you eject a flash drive, you're telling the operating system that the drive is about to be disconnected. The operating system completes any read or write operations on the drive and unmounts it from the computer.
If you don't eject a USB flash drive before it's disconnected, there's a chance that the drives data will be corrupted, because the operating system was not expecting it to be disconnected. For this reason, it's best to always eject your USB drive before physically disconnecting it from your USB port.
The Windows, macOS X, Linux, and Chrome OS operating systems each provide a safe method to eject a flash drive.
Eject a USB drive in Windows
Using the notification area
- In the Notification Area of the taskbar, click the up arrow to view the items in the systray. Then, right-click the Eject Media icon.
- A menu lists the removable media you can eject. Click the name of your USB flash drive. In this example, the option to eject the USB flash drive is named 'Eject Cruzer Glide.'
After clicking the eject option, wait for a message stating it is safe to remove the hardware before pulling the flash drive out of your computer.
Using File Explorer
- Open File Explorer by pressing Win+E.
- On the left, click This PC.
- On the right, right-click your USB flash drive.
- Select Eject.
Eject a USB drive in macOS
With ⌘+E keyboard shortcut
- Locate the USB flash drive on your desktop. Click it once to select it.
- On your keyboard, press ⌘+E to eject the flash drive.
In Finder
- Open the Finder utility. On the left, locate your USB flash drive under Devices.
- Click the eject icon (⏏) to the right of the flash drive.
Using Trash
- Locate the USB flash drive on your desktop.
- Drag-and-drop the USB flash drive into the trash bin icon. When you start dragging a removable disk, such as your USB flash drive, the Trash turns into an eject (⏏) icon. When you drop the disk on the eject icon, the disk is ejected. No data is deleted by using the Trash icon this way.
You can now safely remove the USB flash drive from your computer.
Eject a USB drive in Linux
In a Linux operating system, you can eject a USB flash drive in your file manager, or in the command line shell.
File manager example: Nautilus
In this example, we'll eject a USB flash drive using Nautilus, the default file manager in Ubuntu. Nautilus is a lot like the Windows File Explorer. (Your file manager may be different if you're using another Linux OS.)
Open a new Nautilus window by clicking the shortcut on your dock. It looks like a file cabinet, labeled Files.
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Or, click Activities (on the left side of your taskbar). In the search box, type Files, or Nautilus. In the search results, click the Files icon.
Or, open a terminal (Ctrl+Alt+T), type nautilus, and press Enter.
In the Nautilus file manager window, you'll find your USB flash drive listed on the left. Click the eject icon (⏏) next to the disk name.
Your disk is removed from the list, and a notification informs you that it's safe to remove the USB flash drive.
Ejecting from the Linux shell
In every Linux operating system, the administrator can eject a mounted USB flash drive with the eject command, specifying the device name of the USB flash drive.
For example, if your USB flash drive is mounted as the device name /dev/sdc, and you're a sudoer (administrator rights), you can eject it with the command:
Here, the sudo command means 'run the following command as administrator.' When you press Enter, you are prompted for your password.
When the command runs, all pending I/O operations for the specified device are forced to complete immediately, as if you'd run the sync command. Then, the device is unmounted, as if you'd run umount.
If the eject is successful, the command displays no output. You can safely disconnect your USB flash drive.
Determining your flash drive's device name
If you're not sure of the device name for your USB flash drive, you can list it with parted.
The device name of your USB flash drive is /dev/sdx, where x is a lowercase letter a–z.
List your mounted devices by running parted -l as root, or with sudo:
In this example, disk /dev/sdb is our USB flash drive, so the eject command would be:
Eject a USB drive in Chrome OS
- Open the Files app on the Chrome OS device.
- In the left navigation pane, find the USB drive.
- Click the eject icon to the right of the USB drive. When the USB drive disappears from the Files app, it is safe to remove the USB drive from the Chrome OS device.
Additional information
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- See the flash drive and USB definitions for further information related links.
Sometimes OS X doesn’t want to let you eject a volume or an external drive. Sometimes this is because a program is using a file on the volume in question, but other times the volume just seems to be stuck! Fortunately, there’s an easy solution! We’ll show you two ways to force your Mac to let go!
Method 1
The easiest and safest way to force a volume to eject is to open a new Finder window, locate the drive or volume in the left-hand column, right-click or option-click the volume, and select Eject “[Volume Name]” in the drop down menu.
You may see a message like the one above, telling you that there may be a program using that volume. If you’re sure that’s not the case, then click “Force Eject…”, and Voila! That’s all there is to it!
Method 2
For those of you that prefer using Terminal, or would rather eject the drive with a single command, simply open Terminal, and type the following:
Step One: Download and Install Backup and SyncNaturally, the first thing you’ll need to do is. If you already have Google Drive installed, don’t worry—this tool will automatically replace it, no uninstallation necessary.It should download pretty quickly, and you’ll just need to launch the installer when it’s finished. Google drive app on mac. Make sure to grab the appropriate download for your device (Mac or PC).
diskutil unmountDisk force /Volumes/DISK_NAME
How to Keep a Network Drive Mounted on Mac OS X with Matching File Sharing and Router Server Names. In addition to the volume connection often being dropped, re-connections often failed if I just double-clicked on the server’s name in the Finder’s sidebar. Mac os x keep network drive mounted. May 04, 2012 It can be helpful to configure Mac OS X to automatically mount shared network drives, this is particularly true for those of us who regularly connect to a network drive for file sharing or backups. Setting up automatic network drive connections in OS X is a two-step process, you must mount the drive, then you add it to your automatic login items. Sep 20, 2010 Map a Network Drive on a Mac. Map a network drive to Mac OS X that re-mounts after system reboot. This method allows you to reboot your Mac and have the mapped network drive / network share automatically connect and remount, appearing on the desktop of OS X or in the Finder sidebar.
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Just replace DISK_NAME with the name of the volume you want to eject, press enter, and you’re done!
I’ve found that the first method is much more successful – I’ve had the disk fail to unmount more than once using the Terminal command.
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Note: Make sure you have closed all applications that may be using the volume you want to eject, and that the volume is not in use. Otherwise, you risk facing data corruption or even data loss! And, as always, use Terminal commands at your own risk!