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MacOS Catalina Patcher (formerly macOS Mojave Patcher, macOS High Sierra Patcher and macOS Sierra Patcher) is a small yet powerful tool that can help you create a bootable USB drive that can be used to install macOS Catalina on Mac computers older than mid 2012, basically acting as a macOS Mojave. Catalina Unus is a command line tool for running macOS Catalina on one HFS or APFS volume. It's integrated into macOS Patcher so you if you have a Mac supported by it, you can create your patched installer using Catalina Unus, and then add macOS Patcher's patches to it by selecting the 'Add patches to patched Catalina Unus installer' option.
macOS Catalina 10.15 is the latest operating system that runs on Apple Mac laptops and desktops. However, it is still in beta test and only available for part of Mac computers with high profile or enrolled in Apple Beta Program. Is there any way to upgrade the macOS to Catalina manually or install Catalina on Mac from scratch? The answer is Yes. But you have to download macOS Cataina DMG or the installer app.
If you are looking for the easiest way to download macOS Catalina DMG on a Macand but don't know how? Well, there are three ways by which you can instantly get the latest macOS installer without a hassle.
Part 1. Get MacOS Catalina DMG Via Direct Download Link
Many people prefer the direct download link of macOS Catalina as it is more flexible. You can unpack the DMG file and make a bootable Catalina installer USB, which can be used to install macOS on other computers. However, it is not easy to find the direct download link because Apple wants you to upgrade from Mac App Store. Fortunately, there are a few good websites that host the direct download link of macOS Catalina DMG. After that, you can burn the macOS dmg to USB to make it bootable for installation.
macOS Catalina 10.15 DMG Download Link 1: https://themacgo.com/macdownload/ (Wait a few seconds and the download starts automatically.)
macOS Catalina 10.15 DMG Download Link 2: https://drive.google.com/drive/folders/1ELQXMuuVWddamLPG0RHjyvaNW4r628CM (Password: Geekrar.com)
macOS Catalina 10.15 DMG Download Link 3: http://www.mediafire.com/file/wazr84baudhi27h/macOS_Catalina_DMG_by_Geekrar.rar/file
macOS Catalina 10.15 DMG Download Link 4: https://sundryfiles.com/G54 (Premium account required for download!)
macOS Catalina 10.15 InstallESDDmg PKG Download Link : http://swcdn.apple.com/content/downloads/61/56/041-83630-A_8RCIBB415Y/7jqh3nh97ood2mjej7hdgpx7fgh5c3fi9g/InstallESDDmg.pkg
macOS Catalina 10.15 VMware Image Download Link: https://www.mediafire.com/file/yrd1py7od5911zt/Catalina_Virtual_Disk_Image_by_Techsviewer.rar/file
macOS Catalina 10.15 VirtualBox Image Download Link: https://www.mediafire.com/file/yrd1py7od5911zt/Catalina_Virtual_Disk_Image_by_Techsviewer.rar/file
Tips: After downloading macOS Catalina .dmg file, it is time to make a macOS bootable USB from it. For this purpose, you can give a try on UUByte DMG Editor, one of the most popular software to create a Catalina USB installer on both Windows PC and Mac.
Part 2. Download macOS Catalina From Mac App Store
Apple always recommends its users downloading macOS install file from Mac App Store for security reasons. It is safe and easy. But the actual downloaded file is not an dmg file. Instead, it is an app called Install macOS Catalina, which is used to make the upgrade from current macOS to Catalina. For a clean install, it is better to download the dmg file and make an installer USB.
Note: Make sure to back up your Mac prior to installing macOS Catalina.
Step 1: Go to Mac App Store and search macOS Catalina. Then hit on 'Get' to download page.
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Step 2: Doing this will open System Preferences followed by the section of Software Update, where you will find MacOS Catalina ready to download. Hit the option saying 'Upgrade Now' and download MacOS Catalina on your Mac.
Step 3: Next, macOS Catalina upgrade will ask for system reboot. Complete the process and install macOS Catalina on that computer.
Downloading macOS Catalina Install app works fine on my of newly devices but it could be problems for old Macs even it is officially supported by Catalina. If this is the case, then you have to patch the OS and install Catalina again. However, you need find a third-party app to do the dirty work. We will talk about this in Part 3.
Part 3. Download macOS Catalina 10.15 Installer with macOS Catalina Patcher
Although it may appear easy to try out the conventional approach of downloading macOS update in Software Update, there are a few known issues on old Macs shipped in 2013 or earlier, meaning the download progress can not be completed successfully. That's why macOS Catalina Patcher tool comes into help. This patching tool makes the job even simpler for installing macOS Catalina on unsupported Mac models.
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However, the file size of these updates differs depending on the Mac device you are using. That means the downloaded update might not necessarily be the full installer version. For instance, if you wish to keep the installer file as archive for further application, or use it to generate bootable flash drive, this file size won't be sufficient.
Fortunately, with macOS Catalina Patcher tool, you can simply download the entire update of macOS setup from Apple's servers. Let's check out the stepwise instructions of how to use this software tool to download the macOS Catalina DMG.
Step 1: Download a copy of macOS Catalina Patcher from this link.
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Step 2: After downloading and attempting to install, an error notification will be prompted. It is due to the unavailability of developer verification credential for macOS. Now, go to System Preferences -> Security & Privacy. Then find the button saying 'Open Anyway' to let the app run.
Step 3: Open macOS Catalina Patcher app and from the main menu, navigate to Options to uncheck the box saying 'Auto-apply Post Install Patches'. As you are done with the previous step and move to the screen as in the link below, hit Download a Copy.
Step 4: The following screen will notify the file size of macOS Catalina you are to download. The resolution is around 7GB and after the download, it will automatically get stored in the Downloads folder. Then hit Continue to initiate the process of download.
Step 5: The download time of the file will depend upon the internet connection and its speed. So, you might have to wait for some while for the process to complete. Eventually, the entire macOS Catalina setup file will be available on your device.
Closing Words
Well, that is all for the day. Hopefully, the above methods were helpful in guiding you on how to download macOS Catalina for both supported and unsupported Macs. When the download is finished, the next step is to burn the DMG file to USB. Then boot macOS from USB and starts the installation wizard.
Back in March, I authored a post on using DeployStudio to image the latest macOS releases that utilized APFS formatting. With the release of Catalina, I had figured this method of preparing machines would end. This is because of Catalina’s unique method of partitioning the APFS container into multiple sections, including both a read-only system volume and a writeable data volume. However, thanks to an updated version of AutoDMG, DeployStudio lives again.
As far as the steps to deploy an APFS image to a machine using DeployStudio, refer to the other article, nothing has changed. Also, remember that this will not work on machines with a T2 chip. The writing is on the wall; that being said, I still have a lot of non-T2 chip machines which makes this worthwhile.
The key here is using the latest beta version of AutoDMG (at the time of writing this, it is v1.10b587). According to the release notes, it supports creating DMGs of macOS Catalina. However, if you try and create a DMG like normal using AutoDMG, you’ll get an error suggesting that InstallInfo.plist is not present in the Catalina installer (which isn’t true). After reading through some of the reported issues with the latest beta, it was suggested that creating a DMG with the Catalina installer on it, then mounting said DMG and using the Catalina installer from that will resolve the issue. Here is what I had success with:
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- First of all, make sure you’re performing this on a computer with plenty of free space. You not only have to download the full macOS Catalina installer, you also have to copy it onto a DMG, and then create the final deployable DMG. This will take up roughly 30 GB of storage, so be prepared.
- Download the latest version of AutoDMG (linked to above).
- Download DosDude’s Catalina Patcher Tool to aid in downloading a full macOS Catalina installer. Upon opening the Patcher Tool, you’ll want to click Continue until you see this screen and can click Download a Copy. If you try downloading Catalina from the App Store, you may get a partial installer app that won’t work with AutoDMG. Make sure to use the Patcher Tool. Once you have downloaded a full macOS Catalina Installer app, you can quit the Patcher Tool.
- The macOS Catalina Installer app should now be present in your ~/Downloads folder. Create a new folder (anywhere, probably easiest just in your Downloads folder) and place the Catalina installer inside of the folder.
- Open the Disk Utility application and navigate to Menu Bar > File > New Image > Image from Folder… I suggest not compressing the disk image, as I have had compression cause issues with mounting/cloning/copying in the past. You can change the Image Format from Compressed to Read-Only. Select the folder that the macOS Catalina installer is in (not the installer itself) and click Save. This will begin a process which creates a disk image with the macOS Catalina Installer on it. For some strange reason, this is what will resolve the error that AutoDMG throws up when trying to create a deployable Catalina disk image.
- After the disk image is created, mount the disk image. Open AutoDMG and drag the macOS Catalina installer app from the disk image onto AutoDMG (like usual).At this point, it’s business as usual. AutoDMG will create an image that you can copy to your DeployStudio repository and deploy to your Macs. Remember that you must select “First Disk Available” when deploying an APFS image in DeployStudio in order for it to work correctly.
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Hopefully this helps someone! If you have non-T2 chip Macs that ever need re-imaging, and you happen to already have access to a DeployStudio server, it’s a no brainer. Thanks for reading!
Peace,
Joel