How To Make A Disk Image Mac

  1. Mac Os Disk Image File
  2. How To Make A Disk Image Mac Air
  3. How To Make A Disk Image Mac Torrent

2007: One of the biggest hassles of the vintage Macintosh hobby is loading software onto your first older Mac. To get that vintage Mac up-and-running, you need to be able to write downloaded software onto disks that an older Mac can read. And that’s what we’ll talk about: Free tools for writing Mac floppy disks and HFS CD-ROMs using modern Mac, Windows, and Linux computers.

Floppy Disk Images

Installing System 6 or System 7.0.1 onto an older Mac is only possible using floppy disks, and the first step to installing System 7.5 is usually “boot from a floppy”. These floppies are distilled into disk images you can download from the Web. When written to a floppy, these images create exact copies of the master disks.

Due to physical differences between Mac and PC floppy drives, 800K double density Mac floppies can only be written by other vintage Macs. This means that boot disks for a Mac 128K, 512K, 512Ke, Plus, pre-FDHD SE, or un-upgraded Mac II cannot be made on a Mac OS X, Linux, or Windows machine. (All other vintage Macs have a 1.4 MB SuperDrive or FDHD [Floppy Disk, High Density] floppy drive, which is compatible with modern computers.)

StuffIt Expander

In order to convert.dmg to.iso, make sure to choose DVD/CD master as the Image Format. Click on Convert. If you want to convert.iso to.dmg, set the Image Format to “compressed” instead. Click on Convert and you’ll have a.dmg file ready to use. Simply rename the converted.cdr file to.ISO and you’ll get a Mac-compatible.ISO image. There are several ways that you can create a disk image on your Mac. Here are three methods for making a DMG file on your Mac. Launch Disk Utility. Click on File on the Menu bar. Select New Image. Provide your details for source and targets. Click save to create the image. Disk Drill Data Recovery Tool. Launch Disk Drill.

Many sources of Mac floppy disk images distribute them in StuffIt (.sit) format. Before these disk images can be written onto real floppy disks, they must be decompressed with StuffIt Expander. This free program is available for Mac, Windows, and Linux/i386.

If StuffIt Expander isn’t available, attempt to find the necessary disk image in uncompressed Disk Copy 4.2 format. These will be immediately useful without any decompression.

I’m currently cooking up some Mac boot floppies that will make installing System software a breeze. I hope to make them available soon using Disk Copy 4.2 format for maximum cross-platform convenience.

Writing a Floppy Disk from an Image

Classic Mac OS

With Mac OS 9 and earlier, just use Disk Copy 6.3.3, which you can freely download from Apple. From the Utilities menu, choose Make a Floppy… and follow the directions onscreen.

Windows

Mac Os Disk Image File

The Windows utility Rawrite can be used to write image files to a floppy using a PC. Put the disk image file and Rawrite into drive C, open a DOS window, type C:Rawrite, and follow the directions. For more information, read this FreeDOS page.

Linux

Linux users can use the “dd” command to write floppies from image files. If the image file is a raw image, a simple “dd if=path_to_image_file of=path_to_floppy_drive” will do the trick. For a DiskCopy image, “dd if=path_to_image_file of=path_to_floppy_drive bs=84 skip=1” is the right way, according to The pickle’s Low-End Mac FAQ.

Mac OS X

At this time, I am not aware of a good, user-friendly way to write floppies from disk images using Mac OS X. Highly advanced users will probably be able to connect a USB floppy drive, determine its device node, and use the method outlined above for Unix-like systems.

Readers with further information are encouraged to email their stories or techniques so we can update this article.

The Mac’s HFS File System

Before we talk about how to burn CDs for older Macs, it’s important to understand why it’s sometimes difficult. It has to do with the way the Mac stores its files using the HFS file system.

A Macintosh file has two “forks” inside it, the Data Fork and the Resource Fork. The Data Fork is like a file on any other computer system, and it’s where universal data (like MP3 songs, JPEG pictures, and plain text) reside. The Resource Fork is a special part that other computers lack. It stores various objects (such as icons, window and menu definitions, and sounds) and helps to make the Mac a Mac.

With the right software, it’s possible to teach other computer systems about the Mac’s resource fork; I don’t consider it to be worth the effort.

We’ll focus on how to burn HFS CDs containing data-only files, such as Internet downloads. It’s much more sensible to let the older Mac decode them itself than to try to do it on a modern computer.

Burning HFS CD-ROMs

How To Make A Disk Image Mac Air

Classic Mac OS

The Classic Mac OS makes this easy – every CD burning application has an obvious “HFS” format option. It’s usually the default choice. Even the built-in Disc Burner that comes with Mac OS 9 can make HFS CDs that work with System 7 Macs.

Mac OS X

Mac OS X speaks HFS, though it has mostly abandoned it for the newer HFS+ format. To burn a System 7-compatible HFS CD in OS X, first create a new disk image using Disk Utility. Select it in the left-side list and click on the Erase tab. Choose Mac OS Standard from the Volume Format dropdown and click the Erase button.

Now copy the files of your choice onto the disk image. When you’re done, unmount the disk image by selecting it and choosing Eject. Enter Disk Utility again and use the Burn Image command to create an HFS-formatted CD readable by all old Macs.

Update: This article was written before OS X 10.6 Snow Leopard. It and later versions of OS X cannot create disk images compatible with vintage Macs, although they can burn CDs from existing compatible disk images. OS X 10.5 Leopard and earlier can create compatible disk images.

Windows

Windows can create HFS CDs using free software called HFVExplorer. Although the program’s homepage seems to have gone offline, you can find it on archive.org. Once you’ve unpacked the software, choose New Image from the File menu. Name your image file and choose an appropriate size.

HFVExplorer’s user interface is modeled after Windows Explorer, so it’s easy to copy the files of your choice onto the CD image. Once you’ve copied the files, quit HFVExplorer. Change the .DSK filename extension to .ISO and write it to CD using your favorite CD burning application.

Linux

Image

The Linux utility mkisofs (from the cdrtools package) has options to create HFS CDs. The easiest way to master your CD begins with putting all the files into a directory. The command “mkisofs -hfs -magic -o mac_cd.iso directory” will create an HFS CD image in mac_cd.iso. Then you can burn the .iso file in the standard way. Read “man mkisofs” for more information on the many advanced options.

Conclusion

With this information, nearly any modern computer can be used to write floppy disks and burn HFS CDs for use with a vintage Mac. Internet downloads can open a new vista of usefulness for these older Macs.

Buy some floppy disks or warm up your CD burner and get ready to put those old machines to good use.

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These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.

What you need to create a bootable installer

  • A USB flash drive or other secondary volume, formatted as Mac OS Extended, with at least 12GB of available storage
  • A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra, or El Capitan

Download macOS

  • Download: macOS Big Sur, macOS Catalina, macOS Mojave, or macOS High Sierra
    These download to your Applications folder as an app named Install macOS [version name]. If the installer opens after downloading, quit it without continuing installation. To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
  • Download: OS X El Capitan
    This downloads as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.

Use the 'createinstallmedia' command in Terminal

  1. Connect the USB flash drive or other volume that you're using for the bootable installer.
  2. Open Terminal, which is in the Utilities folder of your Applications folder.
  3. Type or paste one of the following commands in Terminal. These assume that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace MyVolume in these commands with the name of your volume.

Big Sur:*

Catalina:*

Mojave:*

High Sierra:*

El Capitan:

* If your Mac is using macOS Sierra or earlier, include the --applicationpath argument and installer path, similar to the way this is done in the command for El Capitan.


After typing the command:

  1. Press Return to enter the command.
  2. When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
  3. When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the volume is erased.
  4. After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume. Click OK to allow the copy to proceed.
  5. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Big Sur. You can now quit Terminal and eject the volume.

Use the bootable installer

Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:

How To Make A Disk Image Mac Torrent

Apple silicon

  1. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
  2. Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes and a gear icon labled Options.
  3. Select the volume containing the bootable installer, then click Continue.
  4. When the macOS installer opens, follow the onscreen instructions.

Intel processor

  1. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
  2. Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
  3. Release the Option key when you see a dark screen showing your bootable volumes.
  4. Select the volume containing the bootable installer. Then click the up arrow or press Return.
    If you can't start up from the bootable installer, make sure that the External Boot setting in Startup Security Utility is set to allow booting from external media.
  5. Choose your language, if prompted.
  6. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.

Learn more

For more information about the createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter the appropriate path in Terminal:

  • Big Sur: /Applications/Install macOS Big Sur.app/Contents/Resources/createinstallmedia
  • Catalina: /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia
  • Mojave: /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia
  • High Sierra: /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia
  • El Capitan: /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia

A bootable installer doesn't download macOS from the internet, but it does require an internet connection to get firmware and other information specific to the Mac model.