Get Sequoia InstallAssistant.pkg links from Apple

Get-Sequoia-InstallAssistant-pkg-links-from-Apple.sh

#!/bin/zsh
# Get Sequoia InstallAssistant.pkg links from Apple
# Since macOS 11 (Big Sur), Apple provides the Install macOS ___.app packaged as InstallAssistant.pkg
# The links for the InstallAssistant packages are listed in the seed catalogs
# The seed catalogs are listed in /System/Library/PrivateFrameworks/Seeding.framework/Versions/A/Resources/SeedCatalogs.plist
# For macOS 15 Sequoia the seed catalogs are:
# CustomerSeed
# https://swscan.apple.com/content/catalogs/others/index-15customerseed-15-14-13-12-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog
# DeveloperSeed
# https://swscan.apple.com/content/catalogs/others/index-15seed-15-14-13-12-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog
# PublicSeed
# https://swscan.apple.com/content/catalogs/others/index-15beta-15-14-13-12-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog
# Public release
# https://swscan.apple.com/content/catalogs/others/index-15-14-13-12-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog


for file in $(curl -s https://swscan.apple.com/content/catalogs/others/index-15-14-13-12-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog | grep com_apple_MobileAsset_MacSoftwareUpdate.plist | grep -Evw '(com_apple_MobileAsset_MacSoftwareUpdate.plist.integrityDataV1)' | sed -e s/"<string>"//g -e s/"<\/string>"//g -e s/\ //g); do
    curl -s $file | egrep -A 1 -m 2 '(>Build<|OSVersion)' | sed -e s/"<string>"//g -e s/"<\/string>"//g -e s/\ //g | sed -e s/"<key>"//g -e s/"<\/key>"//g -e s/\ //g
    echo $file | sed -e "s/com_apple_MobileAsset_MacSoftwareUpdate.plist/InstallAssistant.pkg/g"
done