Awesome

Py2/py3 script that can download macOS components direct from Apple

Can also now build Internet Recovery USB installers from Windows using dd and 7zip.

NOTE: As of macOS 11 (Big Sur), Apple has changed the way they distribute macOS, and internet recovery USBs can no longer be built via MakeInstall on Windows. macOS versions through Catalina will still work though.

NOTE 2: As of macOS 11 (Big Sur), Apple distributes the OS via an InstallAssistant.pkg file. BuildmacOSInstallApp.command is not needed to create the install application when in macOS in this case - and you can simply run InstallAssistant.pkg, which will place the install app in your /Applications folder on macOS.

Thanks to:

• FoxletFox for FetchMacOS and outlining the URL setup
• munki for his macadmin-scripts
• timsutton for brigadier
• wolfmannight for manOSDownloader_rc off which BuildmacOSInstallApp.command is based