The list of items needed to complete this project is fairly basic, and I suspect you may already have everything you need.Ī connection to the Internet: You’ll need an Internet connection for downloading the installer from Apple.Ī USB flash drive: 8 GB is the minimum size required, at least for all the versions of the macOS through macOS Catalina. Future versions may require larger flash drives, but for now, 8 GB is big enough. Going larger isn’t a bad idea, though you can use the extra space on the flash drive to store apps and utilities you may need for troubleshooting purposes. You should also consider using a fast flash drive. ![]() ![]() A USB 3 flash drive with fast read speeds would be a good choice.īe sure to quit (Command + Q) the macOS Catalina installer if it starts up after the download is completed.Ī copy of the macOS Catalina installer.This is usually downloaded via the Software Update preference pane (macOS Mojave and later), or the Mac App Store (macOS High Sierra and earlier).
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