Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. MacOS Catalina, macOS Mojave, or macOS High Sierra Download macOSįind the appropriate download link in the upgrade instructions for each macOS version: I have done many things and purchase from tuneup read more. My problem is that I need to install the Adobe Flash Player and I just can't. Hello, I have an i mac version 10.5.8 that I purchased about 4 years ago. Hopefully one of you can help me with this problem. I go to Adobe's website and when I click the flash download option, a window opens saying that I cannot download the program. 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.
