Point brigadier to local copy of BootCampESD.pkg on Windows about brigadier HOT 1 OPEN

Assuming you have 7zip installed, you can do this:

$7z = "$env:ProgramFiles\7-Zip\7z.exe"
$OutputDir = "$env:SystemRoot\Temp"

& $7z -o"$OutputDir" -y e $OutputDir\BootCampESD.pkg
& $7z -o"$OutputDir" -y e $OutputDir\Payload~
& $7z -o"$OutputDir" -y x $OutputDir\WindowsSupport.dmg

Unfortunately, this had been working on older installers but no longer does. Maybe you can play with it and get something similar to work:

$scaction=New-ScheduledTaskAction -Execute "msiexec.exe" -Argument "/i $OutputDir\Bootcamp\Drivers\Apple\BootCamp.msi /qn /norestart"
$sctrigger=New-ScheduledTaskTrigger -AtStartup
$scprincipal=New-ScheduledTaskPrincipal "SYSTEM" -RunLevel Highest
$scsettings=New-ScheduledTaskSettingsSet
$sctask=New-ScheduledTask -Action $scaction -Principal $scprincipal -Trigger $sctrigger -Settings $scsettings
Register-ScheduledTask "Install Bootcamp" -InputObject $sctask -User "SYSTEM"
Restart-Computer -Force

from brigadier.