Create Dmg Backup Mac From Linux

Sep 30, 2013 This OS X backup DMG file is an exact copy of the data on your hard drive. Everything is included in this file, even live files and 'empty' sectors that need data recovery in order to be read. Nov 15, 2016 What You’ll Need. You’ll need two things to create your bootable backup: An external hard drive as big as your Mac’s internal drive. All files on your external drive will be deleted during the backup, so don’t use your Time Machine drive or a drive you use to store important things on. Hi, I have two very simple questions. I'm going to make a full backup of my Mac OS X system disc: I would like to clone it in a.dmg image that I will store in an external USB drive. I don't care if the image will be bootable or not. I just wanna be able to restore my system disc from it in case of future crashes or bad errors. So my questions are.

Oct 15, 2019 DMG file disappears permanently on your Mac, and it seems impossible to get them back. EaseUS Data Recovery Wizard for Mac recovers deleted DMG files from macOS 10.14 - OS X 10.6 with simples clicks. The Mac is an excellent platform for running not only the Mac OS, such as macOS Sierra but also Windows and Linux. The MacBook Pro is a popular platform for running Linux. Under the hood, Mac's hardware is remarkably similar to most of the parts used in modern PCs.

Using disc images to backup a startup volume is not a good idea. Just clone the startup volume directly to the external drive:
How to Clone Using Restore Option of Disk Utility
1. Open Disk Utility from the Utilities folder.
2. Select the destination volume from the left side list.
3. Click on the Erase tab in the DU main window. Set the format type to Mac OS Extended (journaled, if available) and click on the Erase button. This step can be skipped if the destination has already been freshly erased.
4. Click on the Restore tab in the DU main window.
5. Select the destination volume from the left side list and drag it to the Destination entry field.
6. Select the source volume from the left side list and drag it to the Source entry field.
7. Double-check you got it right, then click on the Restore button.
Destination means the external backup drive.
Source means the startup volume/drive.

Apple's Time Machine is the go-to backup method for many Mac users. Apple's termination of the AirPort series puts some users in a lurch over how they will be continuing to back up their Macs using Time Machine when Time Capsule is no more. Luckily there a few Apple approved Time Machine backup optionssans Time Capsule.

However, not everyone will be able or willing to use a spare Mac as a backup location or attach yet another external drive or even buy an expensive Time Machine capable NAS. There do exist other hacked solutions that will allow you to use any networked location — including a Windows share. Although this method cobbles together various utilities to make it function (and as such could be subject to points of failure), you can easily set up Time Machine to use a non-approved location for backups. Here's how!

The problem

The issue that makes Time Machine more difficult in terms of options for backup locations is that it requires use of Apple's proprietary HFS+ filesystem. Although I'm certain the HFS+ features that Time Machine uses for file versioning and linking could be 'mimicked' for use on other more open filesystems, the reality is that Apple chose HFS+ and supports that filesystem exclusively in Time Machine (in fact as of this writing Apple's new APFS isn't even supported for Time Machine backups as of yet).

Create a Windows share location

I won't go into detail on how to create a shared folder on a Windows PC but before you begin, you'll need to have a share created and accessible to your Mac that you want to run Time Machine on. For example, if you have a Windows PC named 'Server' and a network shared folder on the Windows PC named 'share', you'd be able to test for connectivity by doing the following:

Create Dmg Backup Mac From Linux
  1. Start Finder.
  2. Click GO > Connect to Server.
  3. Enter smb://Server/Share where 'server' is the name of the Windows PC and 'share' is the name of the shared folder.

  4. Click Connect.

If you've properly set everything up, you'll be prompted to enter a registered user and password. Make certain to save those credentials to your keychain for the OS to automatically use those credentials for connecting to the share for future access. You should also see that share in Finder in your 'Shared' section and see the 'Eject' icon next to it since it is now mounted.

Create a sparsebundle image

We now need to create an 'image' file that will, in essence, pretend to be an HFS+ filesystem for your Mac to back up to.

  1. Start Disk Utility.
  2. Go to File > New Image > Blank Image.
  3. Rename the Save As to TimeMachine.

  4. Press the Down Arrow next to Save As.
  5. Select your mounted Share.
  6. Rename the Name of your sparsebundle.
  7. Select the Size of the backup location. Be generous. If you want to be able to at the very least backup the entire contents of a full hard drive, elect a size at least equal to your Macintosh HD drive size. As a word of warning, the size you choose will be the size of the disk space that will be immediately created on the remote share.

  8. Make certain that the Format is set to Mac OS Extended (Journaled).
  9. Click Save. This will take a while especially if you set a large file size.
  10. Click Done.

Make the remote share automatically mount

In order for this hack to survive reboots, we need to ensure that the remote share is automatically mounted when you restart your Mac. Here is a simple way to get this done. Some drawbacks of this method are that it only works once you've logged in and it won't work for other users of your Mac.

  1. Start System Preferences.
  2. Select Users & Groups.
  3. Select your Username.
  4. Click Login Items.
  5. Click the +.

  6. Navigate to and select your mounted share and TimeMachine.dmg file we created earlier.
  7. Click Add.

You may need to unmount the share before this can take effect but as of this moment, that share will automatically mount every time you reboot and log in.

Make Time Machine use the remote share and file

Finally, we're ready to make Time Machine see and use the Windows 10 share housing our sparsebundle file.

  1. Start Terminal.
  2. Enter the command sudo tmutil setdestination /Volumes/TimeMachine/ where 'TimeMachine' is the name you gave to your sparsebundle you created with Disk Utility.
  3. Enter your Password.
Create

Check Time Machine

Now we just need to check that Time Machine sees the disk and is ready to use it for backups.

  1. Start System Preferences.
  2. Select Time Machine.
  3. You should now see that Time Machine has a backup location and Select Disk shows the proper name of the sparsebundle.

Final Comments

Yes, this is far and away from the simple 'just works' ideology that Apple is famous for. But if you have no other choice, it works for our Time Machine purposes. Do you have any comments or questions? Let us know in the comment section!

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