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Though .dmg is a macOS disk format, there are a selection causes of why you’d need open them on Home windows computer systems. Here is how you can get began.
The .dmg (Disk Picture) suffix is related to Apple’s Disk Utility archive file format. Disk Picture recordsdata recordsdata assist you to retailer recordsdata and make full disk volumes to share with others.
Apple’s .dmg can comprise APFS or macOS Prolonged (HFS ) volumes, CD, DVD, or Blu-Ray volumes, ISO9660 (optical disks), or Microsoft FAT32 or extFAT volumes.
When creating disk photographs utilizing macOS’s included Disk Utility app in /Purposes/Utilities you even have the choice of password-protecting or encrypting picture recordsdata.
You may as well create empty .dmg recordsdata, double-click them in Finder to mount them in your desktop, then copy recordsdata to them by dragging them to the disk icon.
One downside to .dmg recordsdata is that they’re a proprietary Apple format. Most different working programs, together with Home windows do not natively know how you can learn and write .dmg recordsdata.
Due to third-party software program and a few freeware, you are able to do simply that on Home windows.
There are a variety of free choices for opening .dmg recordsdata on Home windows 11, 10, 8, or 7. By far, the best app to make use of on Home windows to learn .dmg recordsdata is the wonderful and free compression utility 7-Zip.
The 7-Zip utility works within the Home windows File Explorer. After set up, all you want to do to entry a .dmg in Home windows is to put in 7-Zip, then double-click a .dmg picture in File Explorer to open it. A brand new window will open with the .dmg’s contents.
Alternatively, you possibly can right-click a .dmg in Home windows, then on 7-Zip’s submenu choose any one of many three “Extract” choices to extract and replica the contents of a .dmg to a location you specify in Home windows File Explorer.
Working very very similar to 7-Zip, one other app for Home windows capable of extract recordsdata from .dmg’s is PeaZip. As soon as put in on Home windows, the extraction course of is way the identical as 7-Zip: merely proper click on a .dmg file in File Explorer, and choose one of many “Extract” choices from the popup menu. Choose a vacation spot in your PC to retailer the recordsdata.
One other free different to 7-Zip on Home windows is DMG Extractor (with a paid $10 model). The free model is proscribed to 4GB recordsdata, can’t extract from encrypted recordsdata, and may solely extract 5 recordsdata at a time. The paid model removes these limits, and allows you to browse the contents of .dmg recordsdata immediately.
DMG Extractor additionally is aware of how you can extract the contents of iOS .ipa recordsdata on Home windows.
One other free choice is UltraDMG (paid model $40). Whereas designed primarily as a macOS bootable disk picture creator, the Home windows model of UltraDMG additionally permits you to extract the contents of .dmg recordsdata immediately.
There are additionally the free DMGExtractor and HFSExplorer from Erik Larson (who additionally works on the Tuxera product talked about under). They require a Java set up on Home windows to work.
One different free choice, for those who’re barely extra technically inclined is to make use of the forensic software program SleuthKit and its GUI frontend, Post-mortem.
The entire above apps are free or have a restricted free downloadable model together with paid variations.
convert .dmg recordsdata to .iso and .rar recordsdata
Established many years in the past, .iso recordsdata are an industry-standard picture format usually used for optical disks akin to CDs and DVDs, however can be utilized as a common picture format as effectively. Most trendy working programs together with macOS and Home windows can open .iso photographs natively, relying on the precise filesystem used within the .iso picture.
As soon as you change a .dmg file to .iso you possibly can open the .iso file natively in Home windows, assuming the .dmg’s underlying filesystem is one Home windows is aware of how you can learn.
Apple’s Disk Utility has the flexibility to transform most .dmg recordsdata to .iso immediately in macOS. To take action:
- Open Apple’s Disk Utility from the Finder in macOS
- Choose Photographs->Convert from the menubar
- Within the open file pane, choose the .dmg file you wish to convert and click on the Select button
- Within the subsequent Save pane, navigate to the vacation spot the place you wish to save the transformed file
- If you wish to encrypt the brand new disk picture choose an encryption from the Encryption: menu on the backside proper of the pane
- Choose DVD/CD grasp from the “Picture Format:” popup menu on the backside proper of the pane
- Click on “Convert”


Disk Utility will show a progress window exhibiting what it’s doing intimately throughout the conversion, and if the conversion was profitable or not:

If profitable, you will now have a .cdr file on the vacation spot you chose. Merely rename the .cdr file extension to .iso and conversion is full. Now you can copy the .iso file to your Home windows laptop.
You may as well use the command-line instrument hdiutil in Terminal following the directions on this web page. To be taught extra about hdiutil, in Terminal sort:
man hdiutil and press Return.
convert DMG recordsdata in Home windows
If you wish to carry out the .dmg conversion in your Home windows PC, you will want to make use of third-party instruments. Many of the third-party Home windows instruments are paid, with free restricted downloadable demos. The main instruments are:
- UltraISO ($29.95)
- PowerISO ($39.95)
- AnyBurn ($29.95)
- TransMac ($59.95)
- SysTools Disk Picture Viewer Professional($199)
There may be additionally a free on-line .dmg converter referred to as CloudConvert, nevertheless it requires signup with e-mail, Google, Twitter, or Fb first. If you do not have a quick web connection it might take a while to add your .dmg photographs relying on their file measurement.
For example, some DVD photographs might be near 8GB in measurement, some Blu-Ray photographs as much as 50GB.
UltraISO is straightforward and direct: set up it, go to Instruments->Convert and convert your .dmg file on Home windows. It might additionally edit and extract from disk photographs immediately.
UltraISO helps all variations of Home windows again to Home windows 2000 – a number of many years value of Home windows. It additionally has minuscule system necessities: A Pentium 166MHz or later (sure, MHz), a mere 64MB of RAM, and 10MB free disk house.
PowerISO can be easy and simple to make use of and affords direct .dmg file conversion in addition to a bunch of different disk-related choices. It additionally has help for older Home windows variations again to Home windows 98.
PowerISO affords a bunch of choices just like UltraISO together with direct picture enhancing, password safety, compression, direct mounting of photographs, and Compact Disc audio format help and burning. Each merchandise additionally characteristic creating bootable USB drives.
PowerISO additionally has the identical tiny system necessities as UltraISO.
AnyBurn additionally affords simple push-button .dmg file conversion in addition to a bunch of different disk-related options. It additionally helps a 32-bit model and Home windows again to Home windows 2000 and has the identical minimal necessities as UltraISO and PowerISO.
TransMac is one other comparable .dmg disk utility for Home windows and helps Home windows again to Home windows Vista. TransMac additionally affords a number of distinctive options akin to HFS+ formatting, splitting and compressing .dmg recordsdata, direct .dmg burning to CD/DVD/Blu-Ray and studying Mac multisession CDs (CDs with blended quantity codecs or a number of volumes on one disc).
SysTools Disk Picture Viewer Professional is the ultimate entry in our listing of full-featured .dmg entry apps for Home windows, however with a steep price ticket of $199 for a single person license, it might be out of attain for some customers. Nonetheless, SysTools Disk Picture Viewer Professional has options on par with the others.
Utilizing .rar as an intermediate format
An alternative choice is to make use of the .rar file format as an intermediate format between .dmg and a format Home windows can perceive (akin to .iso).
Two paid utilities with free trial variations that do which might be WinRAR ($30), and WinZip ($35).
Each merchandise know how you can convert .dmg recordsdata to .rar recordsdata – which may then be decompressed to Home windows or exported to .iso format. There are three tiers of WinZip starting from $30-$100, and all WinZip variations embrace a Mac model.
macOS, in fact, additionally is aware of how you can learn and write the .zip format with its built-in Archive Utility.
Studying overseas file system disks immediately
Two firms make overseas file system drivers for Mac and Home windows which let you open and entry the opposite OS’es disk codecs on one another’s working programs: Paragon Software program and Tuxera.
HFS for Home windows ($19.95) and APFS for Home windows ($49.95) are file system merchandise for Home windows which know how you can mount and entry Apple’s HFS+ and APFS quantity codecs on Home windows computer systems, respectively.
Paragon additionally has an analogous product for macOS (Microsoft NTFS for Mac – $54.99), which does the alternative: it permits you to mount and entry Microsoft Home windows NTFS disks in your Mac desktop.
For dwelling use solely, Paragon affords all three merchandise and a fourth product – Paragon CampTune – for a similar $54.99 – an absolute steal. Paragon additionally affords APFS variations for Linux and Android.
However maybe the most effective cross-platform Home windows/Mac file system product of all of them is Microsoft NTFS for Mac by Tuxera for an astonishing $14 (and a free 15-day trial). Tuxera additionally affords a disk supervisor app for Mac and an APFS implementation for Linux.
Utilizing each the Paragon and Tuxera merchandise, it is simple to picture your .dmg recordsdata down onto bodily media akin to a USB thumb drive, after which merely insert the thumb drive in your Home windows laptop – and vice-versa from Home windows to Mac (assuming you’ve got bought the third-party Mac merchandise).
This will require an additional step, nevertheless it makes accessing overseas file programs on different computer systems a breeze since there is no such thing as a conversion to be performed.

Legacy notes
There are a number of different free Home windows apps on the market that both enable your to entry or convert your .dmg’s to codecs Home windows can perceive, however they have not been up to date in years and a few are therefore just for 32-bit working programs or older variations of macOS.
Two such utilities are dmg2img by Peter Wu and dmg2iso.
There is a present GitHub web page for dmg2iso, however you will need to construct it your self utilizing the directions listed. The web page does not make it clear if the app itself has been up to date for contemporary variations of macOS.
Additionally understand that in case you are attempting to open historical .dmg, .smi, or .img recordsdata from Mac OS 9 or earlier from many years in the past, these disk photographs could comprise older Mac recordsdata which comprise useful resource forks. Should you attempt to copy these recordsdata on a Home windows PC with out third-party HFS+ help put in, it might destroy the recordsdata’ useful resource forks, which may render the recordsdata unusable on older variations of macOS or Mac OS 9.

A assured method to protect useful resource forks in older Mac recordsdata is to picture them from a Mac disk to a macOS Prolonged (HFS+) .dmg after which solely open the .dmg as a read-only quantity.
If you wish to entry your .dmg recordsdata in your Home windows computer systems, you’ve got quite a lot of choices – each free and paid. In a future article we’ll discover how you can create bodily media to move your recordsdata throughout platforms no matter disk format.