Mac OS X 10.5 Leopard Beyond the Basics
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Creating disk images with Disk Utility


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Mac OS X 10.5 Leopard Beyond the Basics

with Christopher Breen

Video: Creating disk images with Disk Utility

When you download a hunk of Mac software, it sometimes arrives in the form of a disk image, which is identified by its .dmg extension. Disk Utility has the ability to create disk images, which can come in handy but how so? Well let's follow along. One of the most immediately useful things you can do with disk images is copy a mounted volume or folder on your Mac. For example, suppose you just got a CD ROM based game for your kid, and that kid is likely to smear it with peanut butter and honey, meaning you have to buy another copy of the disk.
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  1. 2m 34s
    1. Welcome
      2m 34s
  2. 7m 19s
    1. Getting settled into the interface
      3m 46s
    2. Moving more quickly on your Mac
      3m 33s
  3. 18m 43s
    1. Changing languages with the International system preference
      7m 28s
    2. Adding security with the Security system preference
      5m 30s
    3. Configuring a firewall with the Security system preference
      5m 45s
  4. 28m 24s
    1. Adding a Bluetooth device with the Bluetooth system preference
      4m 5s
    2. Configuring your display with the Displays system preference
      6m 46s
    3. Configuring your input devices with the Keyboard & Mouse system preference
      5m 42s
    4. Printing and faxing with the Print & Fax system preference
      8m 15s
    5. Setting the Sound system preference
      3m 36s
  5. 35m 17s
    1. Setting up your MobileMe account with the system preference pane
      8m 35s
    2. Configuring your network connection with the Network system preference
      15m 46s
    3. Sharing your computer with the Sharing system preference
      10m 56s
  6. 41m 31s
    1. Understanding the Accounts system preference
      5m 46s
    2. Creating a new account with the Accounts system preference
      5m 31s
    3. Limiting access with the Parental Controls system preference
      10m 18s
    4. Updating your Mac with the Software Update system preference
      3m 54s
    5. Using Speech
      4m 18s
    6. Changing your startup disk with the Startup Disk system preference
      3m 16s
    7. The Universal Access system preference: The basics
      5m 44s
    8. The Universal Access system preference: VoiceOver
      2m 44s
  7. 33m 13s
    1. Tweaking your account settings
      6m 53s
    2. Organizing and viewing messages
      3m 30s
    3. Filtering mail with Rules
      11m 45s
    4. Importing and exporting mail
      3m 52s
    5. Mail tips
      7m 13s
  8. 14m 1s
    1. Creating complex iCal events
      4m 16s
    2. Publishing and subscribing to calendars
      4m 39s
    3. Importing and exporting calendars
      1m 47s
    4. Expanding iCal
      3m 19s
  9. 18m 54s
    1. Creating complex contacts
      4m 22s
    2. Importing, exporting, and sharing contacts
      5m 10s
    3. Organizing with Groups and Smart Groups
      7m 15s
    4. Printing from your Address Book
      2m 7s
  10. 17m 14s
    1. Doing more with Bookmarks
      3m 26s
    2. Covering your tracks
      3m 25s
    3. Working locally
      3m 54s
    4. Expanding Safari with Saft and PithHelmet
      6m 29s
  11. 54m 0s
    1. Monitoring your computer with Activity Monitor
      8m 31s
    2. Configuring an airport base station with Airport Utility
      4m 9s
    3. Configuring manual settings on an airport base station
      6m 16s
    4. Copying files with Bluetooth File Exchange
      2m 35s
    5. Setting up a partition with Boot Camp Assistant
      2m 35s
    6. Console
      5m 40s
    7. Storing your passwords with Keychain Assistant
      3m 45s
    8. Using keychain access for more than just passwords
      4m 21s
    9. Transferring user accounts with Migration Assistant
      4m 1s
    10. Monitoring your network with Network Utility
      6m 43s
    11. Using System Profiler
      5m 24s
  12. 22m 59s
    1. Understanding Disk Utility
      2m 18s
    2. Verify and repairing with Disk Utility
      3m 13s
    3. Formatting and partitioning with Disk Utility
      4m 27s
    4. Configuring a RAID with Disk Utility
      4m 12s
    5. Creating disk images with Disk Utility
      5m 34s
    6. Burning CDs with Disk Utility
      3m 15s
  13. 18m 17s
    1. Introducing the Terminal
      1m 35s
    2. Essential Terminal commands
      9m 58s
    3. Using the manuals
      1m 20s
    4. More useful Terminal commands
      5m 24s
  14. 7m 8s
    1. Changing permissions
      4m 27s
    2. Enabling the root user
      2m 41s
  15. 19m 14s
    1. Automator essentials
      1m 17s
    2. Creating an Automator workflow
      6m 52s
    3. Mailing images easily
      2m 42s
    4. Creating a timed backup system
      3m 9s
    5. Playing songs randomly from iTunes
      2m 26s
    6. Recording automation
      2m 48s
  16. 16m 12s
    1. Using the Calculator
      3m 16s
    2. Using Font Book
      3m 25s
    3. Importing and managing fonts in Font Book
      5m 1s
    4. Syncing your devices with iSync
      4m 30s
  17. 20m 9s
    1. Keeping your computer healthy
      8m 12s
    2. Using Disk Warrior
      3m 41s
    3. Using Onyx
      8m 16s
  18. 22s
    1. Goodbye
      22s

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Watch the Online Video Course Mac OS X 10.5 Leopard Beyond the Basics
6h 16m Intermediate Jul 16, 2008

Viewers: in countries Watching now:

It's easy to jump online and be productive with Mac OS X, but it's also easy to stop there. Many users haven't explored the depth and richness of this powerful operating system and the applications that come with it. In Mac OS X 10.5 Leopard Beyond the Basics, Chris Breen helps those who are already comfortable with Mac OS X discover new features in everyday applications like Mail, iCal, and Safari. He also explores the often overlooked "power user" tools, including Terminal, Disk Utility, and Automator, and provides troubleshooting and maintenance tips.

Topics include:
  • Customizing the interface Configuring the firewall and other security settings Adding a Bluetooth device and transferring files Networking and sharing files Setting up AirPort Base Station Filtering mail with Rules Creating complex iCal events Importing, exporting, and sharing contacts Using Activity Monitor, Keychain Access, and other utilities Changing permissions and enabling a root user Syncing devices with iSync
Subject:
Business
Software:
Mac OS X
Author:
Christopher Breen

Creating disk images with Disk Utility

When you download a hunk of Mac software, it sometimes arrives in the form of a disk image, which is identified by its .dmg extension. Disk Utility has the ability to create disk images, which can come in handy but how so? Well let's follow along. One of the most immediately useful things you can do with disk images is copy a mounted volume or folder on your Mac. For example, suppose you just got a CD ROM based game for your kid, and that kid is likely to smear it with peanut butter and honey, meaning you have to buy another copy of the disk.

You can create a disk image of that CD and mount it; as far as the Mac is concerned the mounted disk image is the CD so you can safely tuck that disk away from your kid while still allowing him to use it. To this kind of thing insert a CD and select it in Disk Utility, choose File, New, and then Disk Image From and this will be the name of your media drive. In the sheet that appears you have a number of options. You can leave it as compressed, if you are copying a disk and you want to do it bit by bit for example an installation disk of some kind, you might choose DVD/CD Master, this is what I do.

You can also do Read Only, let's try Read Only, and encryption should be none. Click Save, and we will create a disk image on the desktop and now we have our disk image. Now this can take a while, we sped this up so you wouldn't have to sit through the creation process but it maybe a good idea if you particularly have a DVD that you are creating an image from. Start the process, go have a cup of coffee and by the time you come back everything should be ready to go.

Once you have this disk image, you can mount it simply by selecting it in Disk Utility and clicking Open. And here it is. And we drag that into the trash to unmount it or you can simply double click on the image on the Finder. I will skip that, and here it is again. As I said you can also create a disk image from a folder, to do so, choose File, New, Disk Image From Folder, navigate to our Documents folder, let's take this Music folder here and we click Image.

Now here's something interesting that you can do. In the sheet that appears choose Compressed and then one of the encryption options and click Save. You will be asked for a password for this disk image and click OK. Great, so now we have our image, so what good is this? You have now created a compressed image file that requires a password to open.

You can now pass this file along to someone you trust without fears that other people will be able to open it or don't pass it along and keep it as a password protected archive that only you can open. Speaking of password protection, you can use this disk image capability to create password protected virtual and expandable volumes on your Mac and you do it like this. Click the New Image button at the top of the window. In the sheet that appears, enter a name for your archive. In the Volume Size pop up menu, choose the size of the archive you would like, we will make this one 500 megabytes.

From the Encryption pop-up menu choose the kind of encryption that you would like, and from the Image Format pop-up menu choose Sparse Disk Image. Click Create and once again I am prompted for a password so I will enter one. Now note I am going to disable the option to remember password in my Keychain and the reason I do this is because I want this to be encrypted. If somebody sits down on my computer while I am using it if I have wandered away for a bit they come in and they find my image and double click on it, they will be prompted for a password.

If I remember that password in the Keychain this doesn't help me very much if I leave the computer and somebody double clicks on it because up comes the image, because it is in the Keychain and they can access my files, and now I will click OK to create that disk image, and there we are. So at this point I can drag files into this disk image if I like. Once I am finished with it I just drag it into the trash. Now somebody walks up to my Mac later and says, "Oh, your files, let's just check that out" and they double click on it, they are prompted for the password that I have put into the disk image.

Well let's see if we just do share password, how about that? Okay, gee, I still have to enter the password so you can see how secure this is and that's a real benefit to you. Another benefit of this sparse image is that it's expandable. Regular disk images hog all the space you have allotted to them so that if you have created 500 MB image for example, that's how much space it will take up on your hard drive. A sparse image understands that you can have as much space as you have given it if needed but it will tell the Mac OS that it is only as big as the sum of the files in it, and of course thanks to the encryption option, you now have that level of extra protection.

And that's how you create disk images in Disk Utility, up next, burning images.

There are currently no FAQs about Mac OS X 10.5 Leopard Beyond the Basics.

 
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