External Disk Drive For Mac

 
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If you buy a new external hard drive, you may notice that working between Mac and PC is an often difficult - but it doesn't need to be. We'll show you everything you need to know about the. The Best External Hard Drives for Mac in 2019. Buying an external hard drive for your Mac is not all that different. Mac-formatted external drive that comes in SSD and spinning disk. Sep 26, 2018  How to make external hard drive compatible with Mac and PC? You can format the drive from either the Mac or the Windows machine. However, if you want to use the Mac to format your external hard drive to exFAT, you’ll face the problem that the external hard drive may not be compatible with the Windows PC. In this case, you can mount external hard drive with the help of free NTFS driver for macOS. Still unable to mount the external hard drive on Mac? There might be problems with the drive itself, but you still have ways to resolve it. Back up at first. Since you can't access the. Nov 14, 2017  It helps to verify and repair a range of issues related to startup HD and external drive problems. If you are able to fix the hard drive or SSD in your Mac (or an external drive) using Disk Utility you will hopefully be able to recover your files. To run Fist Aid on an external hard drive: Open Disk Utility.

Posted by Katrina to Mac Data Recovery on October 29th, 2018

After upgrading from OS X Sierra to OS X High Sierra on my MacBook Air, I can no longer mount and read my external hard drive. During the upgrade, I converted my MacBook hard drive to APFS. My external drive is formatted as Mac OS Extended.

Is the data on my external drive inaccessible now that I have APFS on my computer? Or is there a way to access it?

When you connect your external hard drive on Mac, if everything is working fine, the operating system will automatically recognize the device and mount its data in the Finder application. However, just like the above example, it may happen that the external hard drive is invisible on the left side menu of Finder and unmounted when checking in Disk Utility. Can't mount an external hard drive on Mac? This post will show you feasible solutions.

Mounting issues on Mac

There are numerous reasons forexternal drive not mounting issue, and below listed are few common ones:

  • >Connecting Hardware
  • >Corrupted disk
  • >Incorrect formatting of the disk
  • >Unsafe removal of the disk
  • >Sudden power disruption

Unable to mount external hard drive on Mac, how to fix?

The following are three effective solutions to external hard drives won't mount on Mac. But before running these steps, please do some basic checks.

Quick fixes of external hard drive not mounting on Mac:

1. Check whether the disk is properly connected to the system and powered on if required.

2. Try a different USB cable to make sure it is not at fault.

3. Try a different port/hub or plug another device in to see if the port/hub works. If you are sure that there is no problem with the USB port/hub, you can plug a working external drive in a port/on a hub, unmount and eject it. Then plug the unmountable external hard drive into that port/hub.

4. Check the file system of the external hard drive. Sometimes when the drive is formatted with NTFS, it can't be mounted on Mac. By default, macOS only enables NTFS drive read support but disables write support. In this case, you can mount external hard drive with the help offree NTFS driver for macOS.

Still unable to mount the external hard drive on Mac? There might be problems with the drive itself, but you still have ways to resolve it.

Back up at first

Since you can't access the external hard drive, all files stored on the drive are lost. In this situation, if you have important files on the external hard drive, any operation on the drive will overwrite the original data, resulting in irreparable data loss. So it's highly recommended to make a backup firstly. Forget to back up before?iBoysoft Mac Data Recovery can help yourecover lost data from the unmountable external hard drive.

iBoysoft Mac Data Recovery is afree external hard drive data recovery tool that enables you to recover data from external drive which is unmounted, formatted, inaccessible, unreadable, or corrupted. It's fully compatible with macOS Catalina 10.15/Mojave 10.14/High Sierra 10.13/10.12 and Mac OS X 10.11/10.10/10.9/10.8/10.7. It supports data recovery from hard drive, external hard drive, USB flash drive, SD card, memory card, pen drive, etc.

Tutorial to recover data from unmountable external drive on Mac with iBoysoft Mac Data Recovery

Step 1: Download and install iBoysoft Mac Data Recovery on Mac.

Step 2: Launch iBoysoft Mac Data Recovery.

Step 3: Select the unmountable external drive drive and click 'Next' button to scan all lost data.

Step 4: Preview the searching results, choose files we need, and click 'Recover' to get them back.

Step 5: Have a check to ensure we have got all lost data back.

Solution 1: Repair the external hard drive with Disk Utility

Step 1: Launch Disk Utility.

Step 2: Choose the unmountable external drive on the left sidebar.

Step 3: Select First Aid in the top center and click Run.

Solution 2: Repair the external hard drive with Terminal

Sometimes, Disk Utility may not function as desired. But you can still repair the corrupted external hard drive with Terminal.

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Step 1: Go to Applications > Terminal

Step 2: Enter: diskutil list (This will list out the available volumes).

Step 3: Check the volume identifier from the table that appears.

Step 4: Enter:diskutil repairVolume [diskvolume identifier]. For example, if the volume identifier of external hard drive is disk2s, you should enterdiskutil repairVolume disk2s.

Solution 3: Reformat the external hard drive

If yourexternal hard drive can't be repaired with Disk Utility and Terminal, the drive might be seriously corrupted. The only way is to reformat it. Reformatting will erase all data on the external hard drive, please make sure you have backed up important data.

1. Launch Disk Utility from Utilities.

2. Click the icon of the unmountable external drive on the left part of the window.

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3. Click the Erase function on the top of the Disk Utility window.

4. Complete the related information (name, format, scheme), then click Erase button.

Still have questions?

By default, your Mac starts up from its built-in hard disk, but a startup disk can be any storage device that contains an operating system compatible with your Mac. For example, if you install macOS on an internal or external drive, your Mac can recognize that drive as a startup disk. You can then follow the steps in this article to start up from it.

Use Startup Disk preferences

When you use Startup Disk preferences to select a startup disk, your Mac starts up from that disk until you choose a different one.

  1. Choose Apple () menu > System Preferences, then click Startup Disk.
  2. Click and enter your administrator password.
  3. Select your startup disk, then restart your Mac.

If you see a message that your security settings do not allow this Mac to use an external startup disk, check the External Boot setting in Startup Security Utility.

Use Startup Manager

When you use Startup Manager to select a startup disk, your Mac starts up from that disk once, then returns to using the disk selected in Startup Disk preferences.

  1. Press and hold the Option key immediately after turning on or restarting your Mac.
  2. Release the Option key when you see the Startup Manager window.
    If your Mac is protected by a firmware password, you can release the key when you're asked to enter the password.
  3. Select your startup disk, then click the arrow under its icon, or press Return.
    If you press and hold the Control key during this step, your selection is saved in Startup Disk preferences, so it persists until you change it.

If your Mac is using OS X Lion 10.7.3 or later, you can also use this method to start up from your Time Machine backup disk. Startup Manager identifies your Time Machine backup as ”EFI Boot.”

If you can't select your startup disk or start up from it

Check for these possibilities if you can't see your disk in Startup Disk preferences or Startup Manager, or your Mac won't start up from it.

Check for a valid operating system on the startup disk

Make sure that your startup disk is using a version of macOS that's compatible with your Mac. You might need to reinstall macOS on that disk.

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Check startup security settings

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If you're using a Mac that has the Apple T2 Security Chip, check the settings in Startup Security Utility. These settings determine whether your Mac can start up from another disk.

Check for Option ROM firmware

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If you're in Startup Manager and can't see your startup disk, press Option-Shift-Command-Period. If that works, do this each time you want to start up from the device or from a startup disk connected to it.

To enhance system security, Mac computers with up-to-date software don’t show devices that have Option ROM firmware until you press these keys in Startup Manager to load the firmware. On Mac models from early 2015 or earlier, you can disable this security feature to load Option ROM firmware automatically. This removes an important protection against potential unauthorized access to your Mac by other people with physical access to it.

  1. Open the Terminal app, which is in the Utilities folder of your Applications folder.
  2. Type sudo nvram enable-legacy-orom-behavior=1, then press Return.
    To undo this command, enter sudo nvram -d enable-legacy-orom-behavior.

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If you're using a firmware password on your Mac, the ability to load Option ROM firmware automatically or manually is disabled as an additional security protection. If you want to remove this additional protection but keep your firmware password:

  1. Open the Terminal app, which is in the Utilities folder of your Applications folder.
  2. Type this command, then press Return:
    sudo firmwarepasswd -setmode command -allow-oroms
    To undo this command, enter sudo firmwarepasswd -setmode command.
  3. Type the administrator password for your user account, then press Return.
  4. Type your firmware password, then press Return.
  5. Restart your Mac.