Missing files for BigSur and Monterey

[DarthApron]

Hello CorpNewt and others,

while download and BuildmacOSInstallApp.command worked for Catalina, it does not work for BigSur and Monterey.
The download itself finishes successfully, but using the BuildmacOSInstallApp.command comes up with this message:

#######################################################
 #              Missing Required Files                 #
#######################################################
That folder is missing the following required files:
BaseSystem.dmg, BaseSystem.chunklist, InstallESDDmg.pkg, AppleDiagnostics.dmg, AppleDiagnostics.chunklist

This is true, as these files are missing and are not downloaded at all.

Now I have many questions. ;-)

Are these files required at all?
Where do I get them?
Why they are not downloaded?
How can I create a working "Install MacOS.app" for BigSur or Monterey from the files I have?

For BigSur these files were downloaded with a total size of 12.46 GB, so there must be something at least:

#######################################################
 #                 Downloaded 6 of 6                   #
#######################################################

Succeeded:
  MajorOSInfo.pkg
  UpdateBrain.zip
  InstallAssistant.pkg
  BuildManifest.plist
  Info.plist
  InstallInfo.plist

I also tried it on Windows, the result is the same.

Many thanks for your input.

[tianyehuakai]

这是来自QQ邮箱的假期自动回复邮件。   您好，我最近正在休假中，无法亲自回复您的邮件。我将在假期结束后，尽快给您回复。

[acheong08]

@DarthApron Double click on the InstallAssistant.pkg and that will build it automatically into /Applications

[realedk]

Thanks @acheong08 this helped me!

[AlJohri]

Thanks @acheong08! Was stuck on this as well.

In retrospect, I see now that this is noted in the README:

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.