If you decide to change the Windows operating system to Mac OS and even downloaded a disk image, then you will encounter one problem. The fact is that the Mac OS image is made in dmg format, which is not supported by other operating systems. To record a dmg file, you will need to convert it to iso format or use a special software.
You will need
- - UltraISO;
- - TransMac.
Instructions
We looked at how to format disks, partition media, and create and assign different file systems and file structures.
In this third part, we will look at working with disk images, how to create a blank disk image, how to create a disk image from storage media, such as an HDD or CD, and other issues that you may encounter while using your Mac.
The initial question that arises for the user is how to create a .dmg disk image from a folder, CD/DVD disk or HDD, for example when .
With this, as before, the program will help us “ Disk Utility» which is located in Finder->Programs->Utilities.
We reviewed its interface and strongly recommend that you read it so that no questions arise in the future.
How to create a .dmg disk image from a CD/DVD or HDD folder:
1) Open Disk Utility
2) B top menu go to “File->New->Disk image from folder”
3) Then select the folder or drive from which you want to make backup copy. If you want to make an image from your main HDD, you must first boot from Recovery HD or from
4) After selecting the folder or media from which you want to make the image, you will be asked to assign a name to the image, a place to save it and the image format.
If the name and storage location of the image are clear, then we will dwell on the image format in more detail.
- Read only- the most popular disk image format. The main advantage of this format is the speed of creation. Due to the fact that it has no compression, the data is simply copied, thus saving time. Among the disadvantages, one can note the space occupied on the hard drive - slightly more than the weight of the folder/media from which the image was created. Data written to such an image cannot be changed.
- Compressed- An image in this format takes longer to create, but takes up less space due to data compression. Also, working with this disk image will be slower, since the data will be “unzipped”. Data written to such an image cannot be changed.
- Read/Write - this image format is very similar to the read-only format, with one exception - the data written to such an image can be changed, deleted, or appended.
- DVD/CD Master -
- Hybrid (HFS+/ISO/UDF) - This image format is used, like the DVD/CD Master, for cross-platform image transfer. The advantage of this image is that its extension can be changed to .dmg for Mac OS, to .iso for Windows, and to UDF (Universal Disk Format, universal disk format). Data written to such an image cannot be changed.
After selecting the appropriate format, click “Save” to begin the image creation process.
How to create an empty .dmg image for subsequent recording of files
An empty disk image may be needed when the content of the image may change or be supplemented. In most cases, such images are used to store data locally on a computer. Also, an empty disk image is used as a backup destination using Time Machine, if your media is not supported by standard Mac OS tools.
1) Open Disk Utility
2) In the top menu, go to “File->New->Empty disk image”
3) Now fill in all the fields:
- Image name. Whatever the disk image is called, the name may change in the future. And the storage location for the image.
- Name is the name of the section. Displayed during mounting. It will not be possible to change it in the future
- Size You can choose from standard images, or assign your own. We recommend that you allocate more space than may be needed. For example, if you plan to have 1 GB of data, allocate 1.5 GB, since you cannot increase the size in the future and you will have to re-create the image, which will take time.
- Format choose at your discretion. You can understand how they differ in
- Encryption- an important point, a paragraph is allocated to it just below.
- Sections- choose at your discretion. You can understand how they differ by reading
- On image format Let's stop further. We are offered to create a disk image in the following formats:
- Growing disk image package. In this format, the disk image will have the extension sparsebundle. This is an expanding disk image that consists of small parts of 8.5 MB each. those. if you have 30 MB of data in the image, then the image takes 30 MB. Such an image can expand to the maximum value that you specified in the “size” field. The advantage of this image is evident during a backup, since Time Machine does not copy the entire image, but only small 8.5 MB files that have changed.
- Growing disk image In this format, the disk image will have the extension sparseimage. It is identical to the Growing Disk Image Pack, but consists of a single file. those. in case of changes, Time Machine will make a backup copy of the entire file, which is not convenient if the file is large.
- disk image for reading and writing. This image consists of one file and takes up the maximum amount of space (which you specified in the “size” field), regardless of the data written to it
- DVD/CD master this image format is mainly used for subsequent use of the file in the operating room Windows system. An image in this format will have the extension .cdr and not .dmg, as in other cases. In order for such an image to be mounted (read) on Windows, it is enough to rename the file from “Image_name.cdr” to “Image_name.iso”.
After filling in all the items, click “Create” to create a disk image.
How to create an encrypted disk image
In the era of high technology, the issue of protecting information and data is becoming ever closer. The article talks about one of the ways to protect information - creating encrypted images for additional protection when storing data or sending it securely over the Internet. An encrypted disk image is practically analogous to an encrypted flash drive. . In this chapter we will describe in detail how to do this.
Regardless of the format, file system and whether you create an empty disk image or from a folder/media, you have a drop-down menu “encryption” where you can select 3 types of image encryption:
- no encryption - The image will be connected (mounted) without a password.
- 128-bit AES The image will be connected (mounted) with a password. This type encryption is recommended for most data, since a low level of encryption has little effect on speed
- 256-bit AES. The image will be connected (mounted) with a password. This type of encryption is recommended for particularly sensitive data that should not fall into the wrong hands. Disadvantages include slow work with large volumes of data.
If the image is password protected, a dialog box will be displayed each time you mount it, asking for the password. Let us remind you that if you want to reliably protect your data, do not check the “Show password” and “Remember password in keychain” checkboxes.
How to increase the maximum image size
As stated above, you cannot change the maximum image size, so set it with a margin. In fact, this is not entirely true; changing the size, although difficult, is possible.
Boot MAC flash drive The OS is created quite simply and quickly. This can be done using the same operating system or any other.
1. We use MAC OS
In all cases, to complete the task we will need an empty flash drive with a capacity of at least 8 GB, as well as an Internet connection. In case MAC usage OS is also required account in Apple ID.
Step by step creation process boot drive looks like this:
- Download the system image from apple.com. There's always latest version. Usually on the main page there is promotional material for the OS and the inscription “Update your system now.” It can also be found in App Store. To do this, use the search. Apple companies often give away their latest creations for free.
- Insert the flash drive. Run the downloaded image. This special utility to create bootable media. In the left panel, select the inserted drive. Go to the "Partition" tab.
- Under “Partition Layout”, select “1 Partition”. It is also advisable to indicate the name of the flash drive. It is most convenient to name it according to the name of the operating system. In our case it is “El Captain”.
- In addition, indicate the format next to “Format” “Mac OS Extended (Journaled)” and the size of the flash drive - enter as much as is on the media. Click Apply.
- Now go back to the downloaded folder and launch the terminal. In it, enter the command shown in Figure 2. It can also be seen in this file.
- Wait approximately 15 minutes. After this, the process will be completed and you will have bootable media ready to install the operating system.
Clue: To boot from the resulting media, connect it to your computer while holding down the Alt button. Then simply follow the installer's instructions.
As you can see, everything here is extremely simple. Difficulties arise if you are not able to use MAC OS to complete the task. Then you will have to resort to “workarounds”.
2. We use Windows
In this case installation image It won't work with the App Store. You need to search on torrent trackers or regular sites. And then there are two options - either you will find the image in .dmg format, or in .iso format.
In the first case, you need to do this:
- Download and install the TransMac program on your computer. The best way to do this is on the website acutesystems.com (it’s official). The program is paid, but it has a trial period of 15 days. During this time, you can manage to create many flash drives.
- In the left panel, select the flash drive that you are going to make bootable. Right-click on it and click “Format Disk for Mac” in the drop-down list. A prompt will appear in which you simply need to click “Yes” or “OK”.
- Once formatting is complete, right-click on the drive again, but now select “Restore with Disk Image.”
- In the window that appears, under the inscription “Disk Image to restore”, indicate the path to the .dmg file that you downloaded earlier. Click OK. In all subsequent warnings, also click “OK” or “Yes”. Everywhere they talk about the fact that all data will be lost, and the image will be installed on the selected disk. But that's what we need.
In the future, use the flash drive in the same way as when creating one in MAC OS, that is, insert it into the computer and hold down “Alt”. The corresponding menu will appear and the OS can be easily installed.
If you managed to find an image in .iso format (which is most likely), then you have a huge variety of options for creating a bootable drive with it. And they are all absolutely free. For example, you can use Rufus.
To do this, do this:
- Download the program from the official website (rufus.akeo.ie) and run it on your computer.
- In the “Device” field, select the flash drive that you are going to make bootable. You can change the remaining fields up to the one that concerns the name at your discretion. If you don’t understand, it’s better not to touch them at all.
- In the New Volume Label field, enter the name of your media. This is not necessary, but it is better to name the drive accordingly to make it easier to deal with later.
- Check the boxes next to " Quick formatting" and "Create boot disk" To the right of the last one, select “ISO image” and click on the button in the form of a disk drive. Specify the path to the downloaded image.
- Click "Finish" and wait for the process to complete.
In the same way, you can use the following programs:
- SARDU and others.
Some of them are paid, so be careful.
3. Use Linux
In Linux and Ubuntu everything is much simpler. There is no need to use any here additional programs. All you need is a terminal, the same empty flash drive and the downloaded image.
Important! To complete the task from Linux, you must have an image in .iso format. Others may not be suitable. However, some of the .iso files may not be suitable, but if you download the images in other formats, they definitely cannot be used.
If all this is there, insert the USB flash drive, launch the terminal and do the following:
- Enter the command "diskutil list". After completing it you will see full list disks that are currently being used in the computer. Find your drive there.
- Enter the command "diskutil unmountdisk [media name]". That is, if the flash drive is called “/dev/mydisk”, the command will look like “diskutil unmountdisk /dev/mydisk”.
- Enter the command “sudo dd if=[folder where the image in .iso format is located] of=[name of the removable drive] bs=1024”. Then if the folder with the image is called “z:/papka/obraz”, then the command will look like “sudo dd if= z:/papka/obraz of=/dev/mydisk bs=1024”.
- Wait for the creation process to complete.
As you can see, in Linux it is easiest to complete the task.
Reference: format .dmg - standard file format - disk image in operating systems Macintosh (Mac OS) from Apple Corporation.
You have decided to install Mac OS X retail on your PC. We even downloaded an image of the original disk. Only bad luck, the image is made in the format .dmg ! And Windows doesn’t know it and doesn’t want to open/write it. What to do?
There are two solutions.
First– convert this .dmg into a more familiar and understandable one for Windows And Linux format .iso, and then write it to disk using “regular” programs. It seems like a good method, but here you will have to make additional unnecessary movements to open/close programs, convert, etc. I personally was too lazy to bother with these issues.
I used second way. It is to directly write a .dmg image to disk under Windows . This can be done using the program TransMac.
TransMac- Very simple program For working with dmg images under Windows . It allows you to open them, view them, burn them to disk, and even change them. Despite its simplicity, the program is paid, but has a trial period of 15 days. For the task of writing an image to disk, the trial was enough for me. Therefore, if you do not need to open dmg files under Windows every day, you should not bother looking for all sorts of cracks for this program, as well as buying it :)
This is what the program window looks like:
So let's get started. To record a dmg image to disk you need to open a dialog Tools->Burn CD/DVD Image.
Note: I hope you noticed that the Mac OS X image is quite large in size and will only fit on double layer DVD disc. (At least, the retail image of Max OS X 10.6.6 Snow Leopard is written to just such a blank.)
Select it first drive, which will record, then write speed (everywhere they say that it is better to leave high), and, of course, himself image file to burn . Now click OK.
If you are trying to record an original Mac OS X image, the program will most likely say that the image is packed and will offer unpack it. Agree with this proposal and select the location and name of the file into which the unpacking will be carried out. At the end of it, you will need to open the dialogue again Tools->Burn CD/DVD Image, but choose a new one there, just unpacked dmg image .
Now the program will not swear and require any other body movements. Just click OK and recording will begin.
At the end of it, you will have a disk with the original Mac OS X, recorded from a dmg image under Windows, no different from the same one recorded under Mac OS X itself.
Note: the performance of the method was tested on Windows 7 x64 With TransMac version 9.3 trial.
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While Apple has not yet enslaved the whole world, it remains topical issue work in Windows with discs written in Mac OS, or access partitions formatted for Mac OS. TransMac will allow you, in Windows, including Vista, not only to work with files on HFS partitions, but also to create and burn dmg images, which are widely used in Mac OS X.
TransMac Properties
- Reads and writes CDs, DVDs (including dual-layer), high-density floppy disks, and disk images in the format used by the Mac.
- Supports HFS (Mac OS Standard), HFS+ (Mac OS Extended) and HFSX (“case sensitive” file names) hard drive partitions.
- Accessing Mac partitions on the startup disk ( Boot Camp, For example).
- Create, write, read and compress Mac disk images (dmg and sparseimage).
- Burn ISO and dmg/sparseimage images to CD/DVD.
- Formatting drives for use on Mac.
- Reading Mac multisession and hybrid CDs.
Access to Mac partitions
The ability to access files on Mac OS X partitions can be a godsend for many, especially if you have Windows installed on your Mac. Then the files on the HFS partitions will be available to you thanks to TransMac. True, access is only in read mode, that is, you can view, copy, but there is no ability to write. My external USB drive, for example, is divided into two partitions: FAT32 and HFS+. Now I can also access the latter from Windows - this is certainly very convenient. Similarly, you can use TransMac to access files on a CD/DVD that were recorded without Windows compatibility mode, as can be done, for example, .
Creating and recording dmg images
TransMac, among other things, provides a very useful and rather rare opportunity for Windows to more or less fully work with Dmg files. They can not only be created and viewed, but also recorded. The dmg image creation dialog allows you to set the file size or determine it, depending on which disk is located in optical drive. In addition, you specify the file system type of the image - HFS (Mac OS Standard) or HFS+ (Mac OS Extended). After creating a new dmg image, you can add files to it simply by dragging them into the TransMac window.
In general, the program is not oversaturated with a bunch of functions and gadgets, and has rather modest recording settings. But, as for me, the ability in Windows to create/write dmg images and access to Mac partitions OS costs a lot. It seems that the developers think the same thing, which is reflected in the price of the TransMac. But the trial version, which is available for download, works for 30 days and has no restrictions.
How to work
