Run Macos On An External Hdd For Weindows

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They all stay compiled into one 'App' file. Taking advantage of this, we can move all of our hefty apps and support files over to an external drive to free up space on the built-in drive, and in short, speed up your system. Choosing an External Drive. The best external drives for Mac computers are undoubtably G-DRIVE ones. They're reliable.

Apple is trying to get us to dongle attach 'all the things' but what happens when that philosophy doesn't jive with all of your computing needs? One such situation is when wanting to run Windows 10 natively on your Mac (in my case my Mac mini). The 'normal' method would be to use Boot Camp to repartition your internal hard drive to make room for Windows 10. However, in some instances, repartitioning may not be an option. For example due to disk size limitations. Attaching a Thunderbolt 3 connected drive is the obvious solution but Windows 10 does NOT like to be installed onto detachable devices. Here's how to force the install of Windows 10 onto your externally attached drive!

What you'll need

Hardware

Of course you'll need an externally connected drive. I went with a 240GB SATA SSD ($30) that I placed into Thunderbolt 3 capable external SATA enclosure ($9).

Software

First up we'll need an ISO copy of Windows 10.

  1. Navigate to the Windows 10 Download site.
  2. Select Windows 10 as the edition.

  3. Click Confirm.

  4. Select the Language you want.
  5. Click Confirm.
  6. Click the 64-bit Download.
  7. And the download will now begin.

Next, you can download the 30 day free trial of VMware Fusion.

  1. Navigate to the VMware Fusion download site.
  2. Click Download Now.
  3. Allow the download to complete.

Next, we'll need to get a Windows utility called Win-to-USB. Although there is a free version, installing Windows latest 1809 October update will require use to but the non-free version ($30). You are free to use the free version for older Windows 10 ISO's suck as 1803.

  1. Navigate to the Win-to-USB site.
  2. Select Upgrade to buy a license. (or if using an older Windows 10 ISO simply click Download for the free version).
  3. Click Download to get the software.

Finally, we'll need the Boot Camp Windows support files.

  1. Start Boot Camp Assistant from Spotlight.
  2. From the menu bar at the top of your screen click Action.

  3. Select Download support software.

  4. Choose a Download location and click Save.

The setup

The external drive

Run Mac Os On An External Hdd For Windows 8 1

  1. Attach your external drive to your Mac.
  2. Start Disk Utility from Spotlight.
  3. Select your external drive.
  4. Click Erase.
  5. Rename the drive to Boot Camp.
  6. Ensure that the Format is Mac OS Extended (Journaled).

  7. Ensure the Scheme is set to GUID Partition Map.

  8. Click Erase.

VMware Fusion

  1. Install the VMware Fusion software we downloaded earlier by double clicking the DMG file.
  2. Double click the Installer.
  3. Enter your Password.
  4. Agree to the user agreement and select *try VMware Fusion for 30 days**.
  5. Create a New Virtual Machine.
  6. Drag and drop the Windows ISO file you downloaded earlier onto the VMware Fusion Window.

  7. Click Continue.

  8. Select your Windows Version to install. I use Windows 10 Home.
  9. Click Continue.
  10. Click Continue without key.
  11. Select More isolated.
  12. Click Continue.
  13. Click Finish.
  14. Click Save to allow the software to install Windows 10 in a virtual machine.
  15. Allow the Virtual Machine to boot into a Windows 10 desktop.

Windows 10 VM

Your Windows 10 VM should now be up and running. We will now prepare the external drive and put a basic installation of Window s10 on it.

  1. Click the Wrench Icon to start VM Settings.

  2. Click USB & Bluetooth.

  3. Check your external drive (here called Boot Camp).

  4. Click OK.

  5. Right-click the Windows Icon.

  6. Select Disk Management.

  7. Right-Click the Primary Partition of the attached drive.

  8. Select Delete Volume.

  9. Click Yes.
  10. Right-Click on the new Unallocated disk partition.

  11. Select New Simple Volume.

  12. Click Next.
  13. Click Next again.
  14. Again click Next.
  15. Change the Volume Label to Boot Camp.
  16. Click Next.
  17. Click Finish.

Next, we need to attach our Windows ISO to the Windows 10 VM.

  1. From the menu bar select Virtual Machine > CD/DVD SATA > Choose Disk or Disk Image.

  2. Select the Windows 10 ISO we downloaded.
  3. Click Open.
  4. From the menu bar select Virtual Machine > CD/DVD SATA > Connect CD/DVD.

Move files into the VM

  1. Drag and drop the WinToUSB_Free.exe file we downloaded earlier into the Windows 10 VM window.
  2. Drag and drop the WindowsSupport file we downloaded from Boot Camp earlier into the Windows 10 VM window.

Install Win-to-USB in the Windows 10 VM

  1. Double-Click the WinToUSBFree.exe in Windows.
  2. Install Win-to-USB with all of the defaults in your selected language.

Next, we run Win-to-USB.

  1. Double-Click the desktop Icon for Win-to-USB.
  2. If you bought a License to install 1809 October update, click Upgrade now.
  3. Enter your license key and click Register.
  4. Restart Win-to-USB.
  5. Select the CD/DVD icon.
  6. From the drop down list select your attached Windows 10 ISO.

  7. Select the version of Windows 10 you wish to install.

  8. Click Next.
  9. From the drop down list select your attached drive.
  10. Select the EFI partition (The smaller partition).
  11. Select the boot partition (The larger partition).
  12. Click Next.
  13. Allow the installation to complete.
  14. Click Exit.

Copy the WindowsSupport files from Boot Camp onto the newly updated windows partition on your externally attached drive.

  1. Open File Explorer.
  2. Navigate to the Boot Camp E: drive.
  3. Move the files onto the Boot Camp E: drive.

Finally, shut down VMware Fusion.

  1. Select Virtual Machine > Shut Down.

Mac OS changes

Now we can set the boot order to boot from the external drive.

  1. Open System Preferences.
  2. Select Startup Disk.
  3. Click the Lock.
  4. Enter your Password.
  5. Select Boot Camp Windows.
  6. Click Restart.

Finishing up

That's it! Once the machine reboots you'll be presented with a Windows 10 install sequence. Follow the prompts like you normally would and you'll be able to run Windows 10 natively on your Mac. Here are some notes to follow up on.

  1. Once your windows installation is complete, remember to navigate into file explorer and install the Boot Camp drivers for your machine. That will setup your network card, display, and other Apple-centric devices. This will also install the Boot Camp program to help you reboot into macOS.
  2. If for some reason you have troubles, power down your Mac and simply detach your external drive. You should be able to simply reboot into macOS.
  3. If that fails, hold Command-Option-P-R all at once and wait until you hear two chimes. Once done, you'll be able to boot back into macOS.

Final comments

Now you can run native Windows 10 and native macOS Mojave. The best of both worlds with little compromise. If you have any tips on getting this working in a better or faster way. Please let us know in the comments!

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Get a data lifeguard for Mac
Disk Drill brings deleted files back from the dead.

Most of the time, when you connect an external hard drive to your Mac’s USB port, you soon see it mount on the desktop. Apple likes to ensure these are easy to find, so they also appear in the Finder in the left-hand column under Devices, since Mac’s treat them the same way as another computer.

However, sometimes, an external hard drive doesn't show up. It’s annoying, especially when you need to transfer something right then. And besides, there can be a risk that data on the external USB pen, hard, or flash drive is corrupt, which means you can’t transfer what you need between devices at all.

Corrupt data can be one reason your Mac won't recognize an external drive, but there are other reasons too. Let’s take a look why this is happening and how you can get an external drive to appear on your Mac and get recover data to access to your documents.

How to fix an external disk drive that won't show up on a Mac

Why an external disk drive is not showing up? There could be a few reasons why a USB flash drive isn’t making an appearance.

Open an External Drive Not Showing on Mac

Get a huge set of top utilities for troubleshooting external hard drives not mounting on a Mac

Start with the basics:

  1. Check whether the drive is properly plugged in. It sounds obvious, but since this relies on a wire - either a USB cable or HDMI cable - if it’s not connected properly then it won’t appear on your desktop.
  2. Faulty cable. Assuming it’s plugged in correctly, not wobbly or loose, the cable could be at fault. Try connecting the same device with a different cable.
  3. Damaged USB or flash drive port. It could be a hardware issue with the Mac. If you’ve got another port, try connecting the device to that one.
  4. Reboot your Mac. Sometimes, if a USB disk won't boot, the cause is macOS issue. Hopefully, some data damage that can be fixed by restarting. Choose the Apple menu > Restart. Or press and hold the power button and, when a dialog box appears, click the Restart or press R. Restarting your Mac essentially clears your macOS’s memory and starts it up fresh.
  5. Incorrectly formatted drive. Not every external drive is optimized for Macs. It could be that you are trying to connect something only fit to interact with Windows devices. If you’ve got a PC or laptop, it’s worth connecting and seeing if you can access the files through another device. The best way to look for an incorrectly formatted drive is to go to
    Apple (in the top toolbar menu) > About This Mac > Storage.
    See if the external drive shows up here. For more information, go to the same menu option, then select System Report.
  6. Mac not formatted to display external drives on the desktop. It could be that your Mac already recognizes the device, but just isn’t showing its icon on the desktop screen. Even if that is the case, the drive will still appear in the left-hand column of the Finder menu under Devices. You should be able to access your drive that way, and, in the Finder menu under Preferences > General, you can check External Drives to ensure that from now on it shows up on your desktop too.
  7. Reset NVRAM. To do this, shut down or restart your Mac, switch it back on and immediately press these four keys together for at least 20 seconds: Option, Command, P, and R. It should look as though your Mac has started again; if it has, release the keys when you hear the second startup chime. Hopefully, the hard drive has shown up now.
  8. Check Apple’s Disk Utility to see if an external drive is showing up. Disk Utility is within System Preferences, or you can find it using Spotlight. If it is visible, then click the option to Mount, which should make it visible on the desktop and in the External Drives option in the Finder menu.

Unfortunately, if none of those options has worked and the external drive still isn’t visible, then it could have crashed, or be well and truly broken. But there might still be a way you can recover the data on the external drive.

How to show connected devices in Finder

  1. Go to the Finder menu and select Preferences (Cmd+comma).
  2. From General tab tick External disks to ensure that from now on it shows on the desktop.

Run Macos On An External Hdd For Windows 7

In the Sidebar tab you can choose which folders and devices will be shown in the left-hand column of the Finder window.

How to add cloud storages to Finder

You can also mount cloud storage as local drive on your Mac. By connecting Google Drive, Dropbox, or Amazon to your computer, you get more space for securely accessing and sharing files. For your ease, add cloud drives to Finder with CloudMounter app, so that you keep them close at hand. You can read detailed instructions on managing cloud storage as local drives here.

Macos

Repair the failed external drives with First Aid

If your drive is having problems, you can try to fix them yourself with First Aid and therefore get access to your files. First Aid tool will check the disk for errors and then attempt a repair as needed. 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:

  1. Open Disk Utility. You can searching for it using Spotlight Search or via Finder > Application > Utility
  2. Check on your external hard drive, click the First Aid tab and select Run to start running diagnostics.

If First Aid successful in fixing errors, the external drive should be available to mount. If the utility unable to repair issues, your drive truly is broken or formatted using a file system that the Mac cannot read - in this way we suggest you follow the next steps to recover data from a damaged disk drive.

How to recover data from a crashed drive

Thankfully, there is an app for that. Disk Drill is the world’s premier data recovery software for Mac OS X. Powerful enough to retrieve long-lost, mistakenly deleted files from Macs, external hard drives and USB drives and camera cards.

Get a file recovery app

With Setapp you get a pack of professional tools for file recovery and Mac maintenance.

An easy way to recover lost files on an external hard drive

Providing you already have Disk Drill Pro version, which you can get automatically by downloading from Setapp:

  1. Connect your drive to the Mac.
  2. Quit all other applications on the Mac, especially those that may be trying to access the external drive (e.g. iPhoto, Words)
  3. Launch Disk Drill.
  4. Click on the external drive that you are trying to recover files from. If it has partitions, you will see all of them. If, however, you still don’t see any volume to the external drive then you may need to try some of the steps above again or read the Disk Drill Scanning FAQs.
  5. To avoid the external drive being accessed during the recovery process, click Extras next to the drive or drive partition or file, then select Remount Volume As Read Only. A padlock will appear, protecting the drive during the process.
  6. Now click Rebuild (or Recover) next to the file(s) you are trying to recover. Once the scan is finished - it may take some time if the files are large - a list of files will appeal.
  7. Next, click Mount Found Items as Disk button on the bottom-left below the scan results.
  8. Disk Drill “strongly suggest saving the files to a different drive than the one you are trying to recover files from. Saving to the same drive substantially lowers your chances of recovery.”
  9. A drive icon will appear, which once you double click will give you the option to open the files as you would do before they were lost. Drag them to another location, such as your desktop or a folder on your Mac.
  10. Open the files to ensure they have been recovered properly and safely eject the external drive.

Disk Drill does have other ways to recover lost files but assuming there aren’t complications, this method is the most effective. Disk Drill Pro recovery app is available from Setapp, along with dozens of Mac apps that will make your life easier. Never have to worry about a crashed or corrupted external drive again.

Run Windows On An External Hard Drive Mac

A few more tips on getting your files back

  1. Macs and third-party apps that look after Macs, such as Disk Drill and iStat Menus come with a S.M.A.R.T. (also known as Self-Monitoring, Analysis and Reporting Technology) status monitor. If a SMART check reports errors, then it could mean the hard drive is at risk of failing completely. Within Disk Utility and Disk Drill, there are several solutions for this: Repair Disk Permissions and Repair Disk. If neither work, it’s recommended that you backup all of the data from the disk, erase, then run a SMART check again. The external hard drive should show up as Verified.
  2. Partitions can get lost within hard drives, temporarily hiding all of the information contained within. Disk Drill can help to identify and restore this information.
  3. Within Disk Drill, you can restore data when a hard drive is damaged or add formatting, which is also something Disk Utility can help with.
  4. CleanMyMac, another useful app available from Setapp, can help you identify external hard drive errors and repair them. It is an essential tool worth trying when you’re having external hard drive difficulties.

Try all these apps for free

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Alternative ways to recover data from an external hard drive

Run Macos On External Hard Drive

Reset the System Management Controller (SMC) if your Mac shuts down when you plug in an external hard drive. Then use a different port to connect the external hard drive. If you’ve got a battery that you can’t remove:

Running Windows From External Hard Drive Mac

  • Shut down and unplug the power adapter
  • Press Shift-Control-Option and the power button at the same time. Do this for 10 seconds
  • Release all keys
  • Plug the power adapter back in and switch your Mac back on

For Macs with removable batteries, you need to switch them off, remove the battery, then press and hold the power button for 5 seconds. After that, put the battery back in, plug in the power adapter and switch the power on again.

What’s your file format? One reason your Mac isn’t recognizing the hard drive is the file format. Windows uses NTFS file formats, while Macs, up until the introduction of Sierra, have used HFS+. Now, Apple has introduced the Apple File System (APFS) for newer operating systems. It is possible to format a hard drive so it can be read on Mac and Windows computers, providing you format using exFAT. However, if you’re having problems accessing the files and the issue is due to formatting, you will need to connect it to a device it can be read on, and then format the files correctly for the computer you are going to use it on next.

How to make Ext2/Ext3 drives readable on Mac

The common issue is Ext2- and Ext3-formatted drives are not readable on macOS. There are two ways to access such external drives on your Mac – via Linux OS or FUSE system. The easiest would be installing Linux to a secondary drive or virtual machine.

If you go with Linux installation, dual boot your Mac with Linux on another drive and use FAT32 as a transfer intermediary. If you don’t have a drive to install Linux to, use virtual machine as an interface for it. Transferring can be done the same way – with FAT32, or via network.

Another option for reading Ext2/Ext3 disks is mounting disk with Filesystem in Userspace (FUSE). Basically, it works as an extra interface enabling file system access via specially installed modules. Here’s how to mount drives with FUSE:

  1. Install FUSE for macOS or MacFUSE as well as fuse-ext2 module.
  2. Use the following Terminal command to enable Disk Utility’s debug menu and see all partitions: defaults write com.apple.DiskUtility DUDebugMenuEnabled 1
  3. Attach your Ext2/Ext3 drive and locate the device name via Disk Utility.
  4. In your user account, create a folder to be used as a mount point.
  5. Use the following Terminal command to mount the drive as read-only: fuse-ext2 /dev/disk2s2 /Volumes/mountpoint
  6. For write support, use the command: fuse-ext2 -o force /dev/disk2s2 /Volumes/mountpoint

And that’s not the only case where Terminal helps you access external drive.

Employ the handy all-powerful Terminal, which always comes forward with solutions for difficult problems. Especially if System Information does recognize the USB or hard drive, but continues to hide it from you, disconnect the drive and try to find it using the Terminal, which you can find in Applications > Utilities.

Run Mac Os On An External Hdd For Windows And Mac

  • Once in the Terminal, type in the command diskutil list
  • A list with information about volumes and drives should appear
  • Look for a section labelled /dev/disk_ (external, physical)
  • Make a note of the whole line after the word disk
  • Now put the following command into the Terminal diskutil info disk followed by the number or digits assigned to that disk
  • Now you should see detailed information about the drive, therefore confirming that your Mac can and does recognize it
  • Eject using the Terminal by entering the command diskutil eject disk followed by the number or digits assigned to that disk
  • Physically remove the disk from you Mac
  • Plug it back in and your Mac should recognize it

Run Macos On An External Hdd For Windows 10

Console is also reliable when it comes to solving tricky problems, although it isn’t always that easy to use. You can find Console under Applications > Utilities > Console. Console shows if an external drive or any error is detected under the Errors and Faults tab. If no errors show up, then the problem is not caused by the device.

To sum up, there are lots of potential solutions for a Mac not reading an external hard drive. If we were to pick one, Disk Drill seems to be the most well-rounded, offering plenty of customizations and power in an easy-to-use interface. Disk Drill Pro recovery app is available via Setapp, along with 150+ Mac apps that strive to make your life much much easier. At the very least, you’ll never have to worry about a crashed or corrupted external drive ever again.