Step 2: Doing this will open System Preferences followed by the section of Software Update, where you will find MacOS Catalina ready to download. Step 1: Go to Mac App Store and search macOS Catalina. Note: Make sure to back up your Mac prior to installing macOS Catalina. For a clean install, it is better to download the dmg file and make an installer USB. Instead, it is an app called Install macOS Catalina, which is used to make the upgrade from current macOS to Catalina. But the actual downloaded file is not an dmg file. Download macOS Catalina From Mac App StoreĪpple always recommends its users downloading macOS install file from Mac App Store for security reasons. 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. dmg file, it is the right time to make a macOS bootable USB from it. MacOS Catalina 10.15 VirtualBox Image Download Link: MacOS Catalina 10.15 VMware Image Download Link: MacOS Catalina 10.15 InstallESDDmg PKG Download Link : MacOS Catalina 10.15 DMG Download Link 4: (Premium account required for download!) MacOS Catalina 10.15 DMG Download Link 3: MacOS Catalina 10.15 DMG Download Link 2: (Password: ) MacOS Catalina 10.15 DMG Download Link 1: (Wait a few seconds and the download starts automatically.) After that, you can burn the macOS dmg to USB to make it bootable for installation. Fortunately, there are a few good websites that host the direct download link of macOS Catalina DMG. However, it is not easy to find the direct download link because Apple wants you to upgrade from Mac App Store. You can unpack the DMG file and make a bootable Catalina installer USB, which can be used to install macOS on other computers. Many people prefer the direct download link of macOS Catalina as it is more flexible. Get MacOS Catalina DMG Via Direct Download Link Download Install DMG from macOS Catalina Patcher Download macos Catalina Installer from Mac App Store I'd also like to try the approaches using Github scripts, but i have never worked w/scripts & am not at all clear on how to get access to/download the scripts & how to use them correctly (either the referenced by the MIST macOS Installer Super Tool referenced by Mr. i must not be giving the correct arguments such as exact version # of Catalina (screenshot attached) Softwareupdate - tried this approach from inside Monterey but kept getting error messages. App Store - already tried & did not receive an installer containing a full OSģ. The from 07-23-2023 03:10 PM to the of ' Fusion 13 / macOS 12 : "Unable to create the installation medium"' from 11-24-2022 in which the hdiutil command in Terminal is used (i have used this method successfully in the past so i am somewhat familiar w/how to use it): after issuing the sudo command, i received an error message of "/Applications/Install macOS Catalina.app does not appear to be a valid OS installer application." even though the Install macOS Catalina.app file was just downloaded it from the App Store. Wow, so i'm still having difficulty either getting or creating some complete version of the Catalina installer that will enable me to create a 10.15 Catalina VM, i have tried several of the approaches referenced in your reply but still so far am not having much luck & seem to keep running into roadblocks. Is there something that needs to be done differently w/10.15 since the installer.app files for 10.13 & 10.14 are 5-6 GB in size & installer.app files for macOS 11 (Big Sur) through 13 (Ventura) are all in the 11-12+ GB size range, yet 10.15 (Catalina) is the only installer.app file which is only 19.1 MB in size? What accounts for this huge size discrepancy & how is Catalina to be handled differently than the other versions when attempting to create a VM in Fusion 10? I'm having a problem trying to create a macOS 10.15 (Catalina) VM in Fusion Pro 10: if i try to use the drag & drop method, i cannot seem to "drop" the Catalina installer file "Install macOS Catalina.app" (only 19.1 MB in size & freshly downloaded from the Mac App store) into the designated space "Install from disc or image"/"Drag your ISO file here to start installing" in the "Select the Installation Method" window.Ĭan i use a different method such as "Create a custom virtual machine"? If so, i need some assistance in setting up the installation as i am not familiar w/this method.Īdditional notes: i have been able to create VMs for macOS 10.13 (High Sierra) & 10.14 (Mojave) using the drag & drop method in Fusion 10 & macOS 10.15 (Catalina) is the only macOS version from 10.13 (High Sierra) thru 13 (Ventura) for which i have not been able to successfully create a VM in Fusion 10.
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