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 ## Semi-automatic installer of macOS on VirtualBox
 
-### Supports macOS Mojave (10.14), and High Sierra (10.13)
+### Supports macOS Mojave (10.14) and High Sierra (10.13)
 ### macOS Catalina 10.15.2 fails to boot on VirtualBox as of the date of its release. Earlier versions of Catalina work, but they are not currently being distributed by Apple's software update servers, from which the script fetches the installer.
 
 The script is semi-automatic and requires a little user interaction. Most of the time the user simply has to press enter. There is one step where the user has to choose between [C]atalina, [M]ojave, or [H]igh Sierra, and a couple of instances where the user has to choose whether to delete or keep temporary files and previous installations.