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Download: macOS Big Sur, macOS Catalina, macOS Mojave, or macOS High Sierra.A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra, or El Capitan.A USB flash drive or other secondary volume formatted as Mac OS Extended, with at least 14GB of available storage.What you need to create a bootable installer

You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time. These advanced steps are primarily for system administrators and others who are familiar with the command line. Open that app from your Applications folder to begin installing the operating system. It installs an app named Install Version Name. Open the disk image, then open the.pkg installer inside the disk image. Safari downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Mac OS Catalina iso download for VirtualBox, macOS Catalina iso download for VMware, VMware, mac os Catalina picture download, mac os Catalina download, download macOS 10.15 Catalina ISO image, download mac os Catalina final dmg iso introduced upgrade now. In Catalina, there is a slew of new features that are entirely unboxed.