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The App store is the best channel to download macOS updates for many people. It works well if you have a smooth network connection and if you don’t have any billing issues with your Apple ID. However, certain times, the download through the App Store is not practical, especially when your Mac is not booting up. In that case, you may want to download a full Mac OS installer in DMG format for making a recovery medium. Let’s check out the options to download macOS Catalina (10.15.1), Mojave (10.14.6), High Sierra (10.13.6) offline installers from and outside the store environment.
Download macOS offline installer [DMG] for Catalina & High Sierra
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We have an article about making a macOS bootable DVD and USB installer disk on Windows PC. This method is mainly useful for people whose Mac is in a corrupted state and when they don’t have a backup. But one need macOS in DMG format for this recovery process. The macOS offline installer (.app) downloaded from the App Store is not compatible with Windows. We have to convert macOS to ISO or DMG on a Mac, before transferring it to Windows for use on Virtualbox and other apps.
Unfortunately, most users who search for the DMG version of macOS probably don’t have their system working. Don’t have a Mac? we will help you with downloading macOS DMG and restore it using a Windows PC.
As shown in the image, the macOS DMG installer will show “macOS detected” message if you have Parallels virtualization app installed. It is because this DMG file is bootable, which you can burn to a USB pen drive or DVD from Windows using a tool like Transmac.
One may use this DMG installer to recover a corrupted Mac or run Catalina or Mojave on unsupported devices. Our file is un-modified, and it’s legal as you own a Mac hardware. We have macOS Mojave 10.14.6, High Sierra 10.13.6, and Catalina 10.15.1 DMG and ISO files in our OneDrive folder for direct and free download. Just mail us to [email protected] for our personal support plan on macOS installer. Please note that we do not provide help for Hackintosh.
We are very sorry for not extending the download for everyone. MacOS Catalina is about 8GB, and providing a direct link costs us much on the hosting side; also, it is illegal to do so. We also invest our time in offering email support. However, you can always purchase a macOS offline USB installer from Amazon.
Looking for Mac OS offline update DMG installer? check below.
Download macOS DMG updates installer
Apple no longer provides the full installer of macOS in DMG format. What they provide in DMG extension is the incremental security and supplemental updates for the already existing OS. That means the macOS DMG files listed on some sites are not the full-size macOS installer. They cannot be used to re-install or recover a computer. These macOS DMG files are actually offline update installers.
Get a DMG installer if you get the error message “macos update could not be installed” in the App store or if the software update download is stuck because of network issues or for any reason.
Latest macOS offline update installers as on 29-10-2019.
Download macOS Catalina offline update 10.15.1 [DMG]: Click here.
Mac OS OS Mojave 10.14.6 DMG update: Combo (Click here), Supplemental Click here, Security update 2019-001Click here.
MacOS High Sierra 2019-006 DMG (latest Security update): Click here
Download macOS High Sierra 10.13.6 DMG (final combo update):Click here
If your computer is running macOS Mojave, download Combo Update 10.14.6 which includes security & bug fixes and new features in one single DMG file. Mac OS High Sierra users do not expect any feature or combo update in 2019 as a new OS has been released. But we believe that Apple will continue issuing security updates for the High Sierra 10.13.6, the version run by all last generation Macs.
Where is macOS full installer (.app) downloaded to?
Usually, people who update to the latest macOS version from the App Store directly proceed to installation when they complete downloading the files. Here, they won’t be able to take a backup of macOS installer as it gets deleted from the system during the upgrade. Saving a copy of the OS is useful if you have multiple Macs. By this way, you could transfer the Mac OS to a USB Flash Drive and launch installation on all systems.
So where is macOS offline installer for Catalina or High Sierra downloaded to? When the App Store finishes transferring the OS to your Mac, an app (icon) starts bouncing on the dock with an upgrade prompt on the screen. Just close it if you want to save the Mac OS for future use.
Now click on the Finder app, and go to the “Applications” folder. Then locate the “Install macOS Catalina” app, which is, in fact, the full macOS installer. Copy the offline OS file to a safe location. Now double-click on the installer and proceed to upgrade the Mac as usual.
Direct download link for macOS installer on App Store.
It is effortless to save Mac OS offline installer if you follow the above method, which uses the App store. But sometimes when you search old macOS versions, you won’t find any results in the App store. All the recent releases of macOS are downloadable from the store, but the listings are not public. Hence, you need a direct link to the macOS listing in the app store if you would like to download them.
Direct download link for macOS Catalina 10.15.1, here, Mojave 10.14.6 (here), High Sierra 10.13.6 (here), Sierra 10.12.6 (here) on App Store.
Download macOS Catalina 10.15.1 installer
A new version of macOS, Catalina 10.15.1, is now available for all Macintosh computers released after 2012. If your hardware permits Catalina installation, you may access it directly from the App Store by clicking the link above. Now, if you have any problem with App Store based download, here is an alternative to download macOS Catalina offline installer. Get the Catalina Patcher application from dosdude, and follow the steps below.
- Mount the DMG file after download and click on the Catalina icon to begin.
- Then press Continue until you see Download a Copy.
- Select a location for saving the macOS Catalina download.
- Now the will fetch the macOS Catalina 10.15 offline installer as shown above.
This tool is developed to support installing macOS Catalina on old hardware. It also has a feature to create a bootable macOS Catalina USB or DVD ISO image after download. Please visit dosedude1.com/catlina for new versions of this tool.
Download macOS High Sierra 10.13 full installer without the app store
Generally when Apple releases macOS upgrade the main focus is to cover maximum devices in terms of compatibility. But it was a total disappointment to know that my iMac which I recently upgraded to an SSD drive is not eligible for Mojave as it doesn’t have the minimum requirements for the update. Like me, many people are still using the previous version of macOS on their system, and the last build they all could install is macOS High Sierra 10.13.6. If you own a system purchased before 2012, the High Sierra is probably the final version of macOS compatible with your machine.
The High Sierra is there in the macOS app store. Unfortunately, I can’t access the Store because of a payment issue with my previous purchase. After checking a few alternatives, I found a reliable third-party app to download macOS without the app store.
- Download macOS High Sierra Patcher from this link.
- Open the app and find Tools from the menu. Now, press on the option to download macOS High Sierra.
- Choose a suitable location to save the macOS High Sierra as an offline installer.
We believe that it is legal to download macOS installer in this way as you are fetching the files from a Mac hardware.
A video illustration of downloading macOS Mojave and High Sierra without the App store is given above.
Download macOS Mojave 10.14.6 offline installer without app store
The offline installer for macOS Mojave is just a click away in the App Store if you are on an eligible Mac. However, if your system is not compatible with Mojave, a warning appears when you click the OS from the App Store. I got an error message “This version of macOS cannot be installed on this computer.” It is possible to bypass this message with the help of Mojave Patcher from Dosdude [get it here]. Be it server connectivity, incompatibility, or billing issue; this tool works effortlessly for downloading the latest macOS without App Store login.
Once you get the DMG file, mount it and open the macOS Mojave Patcher. Just like in the case of High Sierra, go to Tools, and click on “Download macOS Mojave.” The app starts fetching macOS directly from Apple servers when you Save the Location. You don’t need to provide an Apple ID or password.
DMG is a disk image format for Mac just like an ISO file in Windows. That means, it is possible to mount a DMG file on a virtual disk or write it to a DVD and access its contents. A macOS installation package with DMG extension enables creating bootable installer DVDs. My first experience with burning a DMG file to DVD was actually on Windows, back in 2013, when Mountain Lion was the operating system. I accidentally formatted the hard disk of my iMac and lost the recovery partition in the process. The only option left for me was buying an OS X Lion Installer disc as the Internet Recovery required a lot of bandwidth and time. Later, I found a way to burn macOS DMG file to a bootable DVD on my Windows laptop. Eventually, I restored my iMac to OS X 10.8 using the same DVD as macOS installation disc.
Steps to burn DMG file to a bootable macOS DVD in Windows
This is about burning a Mac OS X installer in DMG format (InstallESD.DMG) to a DVD in Windows environment. Please note that it’s an old method applicable for Mac OS X Mountain Lion. However, the procedure is somewhat same if you download a compatible macOS High sierra or Catalina in DMG format for Transmac on Windows.
Let’s see the steps and requirements to achieve what you see in the video.
- Get macOS Installer in DMG format. (Check below for macOS High Sierra and Catalina)
- In the video we use OS X 10.8 Mountain Lion downloaded from the Mac app store. You could also find a copy from the Internet.
- Install the free Windows application 7-ZIP (download) to extract and locate InstallESD.DMG, which includes all files to form a bootable macOS DVD.
- Now, download and install TransMac version 12 (15-day trial) for Windows 10 from this link.
- Run Transmac app as administrator, by right-clicking on its icon.
- Click on the File tab at the top, and select the option “Open Disk Image” to load macOS installer DMG file to the software.
- Find the DMG file loaded on the left side, right-click on it and choose to burn it to DVD.
- Once you write InstallESD.DMG file to DVD on Windows, load it to a Mac and start it.
- Press the Option key and select the listed DVD as your installation source.
The macOS High Sierra and Catalina DMG files have a size around 5.8 and 8 GB. For this file size you need a dual-layer (8.5 GB) DVD. Alternatively, if your Mac doesn’t have a DVD drive, You may consider making a macOS USB installer disk.
Make a macOS install DVD in Windows PC from DMG/ISO image
Apple has changed the file architecture of the macOS installer from OS X Mavericks 10.9. Hence, you cannot follow the above-given technique to directly extract InstallESD.DMG in Windows and make it a bootable DVD in newer macOS variants like Catalina and High Sierra. It is possible to locate InstallESD.DMG or Basesystem.DMG from the ‘Shared Support’ folder inside macOS installation package ending with .APP extension, but still, you cannot make it bootable for a USB or DVD.
A workaround for this problem is to create the DMG file in a Mac itself from the official macOS installer. However, most people searching for methods to burn macOS DVD on Windows don’t have a Mac in working state. We have converted macOS Catalina, Mojave and High Sierra app to DMG format for such users.
This upload is hosted on OneDrive for quick and easy downloads. Although Mojave is the newest macOS release, it is not compatible with older iMacs and MacBook Pros. Hence, we also provide High Sierra in DMG format for those who want it. For personal use on your Mac only. We will set an expiry date for the download link to prevent leaching and hot-linking.
Convert the downloaded macOS Mojave or High Sierra DMG to ISO or IMG
You may want macOS in ISO or IMG format if Transmac doesn’t work as expected to create Install DVD from DMG. It is also useful for running MacOS on Virtualbox.
Download DMG to IMG 1.6.7.
Extract the tool to the folder where you have macOS Mojave or High Sierra DMG installer. Then, right-click and open the DMG file and point to the DMG2IMG program. The conversation starts immediately, showing the progress in a command-line interface.
Windows 10 natively support mounting or burning files with ISO and IMG extensions. Hence, IMG is just enough for the purpose if burning DMG to DVD in Windows PC is the sole requirement. to do this, right-click on the IMG file and pick the option “bun to DVD disc,” and follow the instructions.
We also have an article on how to convert macOS to ISO on Mac and Windows.
Alternative options to burn DMG in Windows 10 without DVD drive.
If you have I an old iMac or MacBook Pro with a DVD slot, you may use the above method to restore macOS through a bootable DVD installer created from a DMG source. However, as you know, none of the new Macs has an optical drive. Let’s check out a few alternatives.
- Format a USB Drive to GPT partition scheme in Windows. Next, restore the macOS Mojave or High Sierra DMG using Transmac.
- Get a portable DVD writer to boot into macOS installer.
External hard disks also work well for this requirement provided the file system is in the HFS+ format with GUID partition scheme.
Burn DMG to DVD in macOS Catalina 10.15
Looking for a way to burn the Catalina or High Sierra DMG Installer on your Mac computer? Here is the simplest and universal method to write files with DMG extension to DVD disc on macOS.
Right-click on the DMG file. Now, as shown in the screenshot, choose the option ” Burn Disk images to Disc.” Then, select the options as required. Keep the burning speed at the lowest rate to avoid write errors, although chances are rare.