If you’ve owned a Mac for a while, you’re well-aware of the fact that updating macOS to the latest version is a pretty straightforward procedure. However, if you’re looking to create a bootable USB drive, a full installer file is necessary, and the update you download from Apple’s servers might not always be the full installer, particularly with Catalina and Mojave (Big Sur does not seem to have this issue, for what it’s worth). Fortunately, downloading a full installer of macOS Catalina is a lot more easier than you might think, and we’re going to show…