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Sometimes it’s the simple things that trip us up. If you use a hub for your connections, if possible try to connect your external drives directly into your Mac–no intermediary. A similar issue is frayed or worn cables, so make sure that your cable is in good condition. Or even if they are recognized, they randomly disconnect without warning or prompting.

Loose connections often lead to external drives not being recognized. So check your cable, your dongle (if used), any additional adapters, and the ports on both computers and drive to ensure that they are clear, clean, snug and fit tightly to each other.Ĭheck that the cable connecting to the ports is indeed connected.

#MAC ERA USB STICK COULD NOT UNMOUNT DISK MAC#

A Tight Fit is a Good FitĪnother reason for your Mac not recognizing external drives is a dirty or loose connection between your cable, USB-C multi-adapter, Thunderbolt 3, or other connecting ports.

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This process means that the software “turns” it off before the hardware. The rule of thumb for external drives is always to shut down, eject, or otherwise disable before unplugging. Or just drag the drive icon to the Trash, changing it to an Eject symbol. Options include right-clicking on the icon of your external drive and selecting “Eject device.” Instead of just pulling out drive connections, always perform a safe remove when ejecting external devices. This tip often does the trick! Rejecting the EjectingĪnother common reason is when you remove the drive without first ejecting. If your MacBook is not mounting an external hard drive or flash drive, try plugging in the power cable to the MacBook and reconnecting the drive. Often, our MacBooks don’t put out enough power across the built-in USB hubs and so adding a self-powered hub sometimes solves the problem straight away. If your drive doesn’t allow for an external power source, try connecting the drive to another USB port. If you instead plug the drive directly into a power source (if a power supply is available for your drive,) the external drive usually mounts on its own now that it has sufficient and steady power. This error frequently occurs when the hard disk is not receiving enough power from the port. The same trick works for all types of computers, Windows or Macs, Desktops or Laptops! Power Problems When they try and plug in the USB flash drive normally, their PC’s don’t recognize the disks.īut if they gently slide them into the port in slo-mo, their drives are recognized! Go figure. Strange but true, some users found that their thumb drives work when they plug it in exceptionally slowly. Just make sure you purchase a hub that is compatible with the latest macOS and is self-powered (i.e.

If that doesn’t work, replacing it (if necessary) usually fixes the problem. First, try plugging the hub into a different port on your Mac. If the drive is now recognized, the problem is likely the hub. So check if the hub is the problem by plugging the external drive directly into the Mac.

THEN Turn ON the external drive when the USB cable is connectedĪ lot of readers discovered that their older model hubs no longer worked in macOS.

Do not use a hub–plug your drive directly into your Mac’s port.

Plug in the USB cable into the Mac and to the device.

The best (or least problematic) method for connecting external drives So it’s better to follow the recommended path to connect your external device(s) to your Mac. That’s why most USB devices are called plug-and-play. It’s easy to plug things in at random times, and usually, our Macs and MacBooks get it right and recognize everything.

Encrypt BackUps for iPhones and iDevices.

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Download Photos from iCloud to USB Drive.

Backup iPhone to an External Drive with iTunes.

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How To Back Up iPhone to an External Drive Using iTunes or Finder and Terminal.

Use Terminal Commands diskutil list, diskutil info disk, & diskutil eject disk.

Run Disk Utility to Mount, Verify, or Repair Drives.

#MAC ERA USB STICK COULD NOT UNMOUNT DISK UPDATE#

Update Finder Preferences to show external drives.Connect the USB device to its own power source, if possible.Check your USB connections for a snug fit or frayed cables, missing pins.If using a hub, try using a different port on your Mac for the hub or plugging your external drives directly into the Mac.Quick Tips Follow these quick tips and get your Mac to recognize and mount your external drives External Drives Very Slow after macOS Update?.Does Your MacBook Shut Down When You Plug In Your External Hard Drive?.

Terminal commands not working or seeing “operation not permitted” in macOS Mojave and above?.

External hard drive won’t mount in macOS High Sierra or above?.