https://support.apple.com/downloads
10.15.6, https://updates.cdn-apple.com/2020/macos/001-22636-20200810-1302b5ed-3d5a-41b3-b892-a0e4b4d197a6/macOSUpd10.15.6.dmg
10.14.4, https://updates.cdn-apple.com/2019/macos/041-49222-20190325-34deb8ef-969c-4548-9760-da0a63e35e7d/macOSUpdCombo10.14.4.dmg
10.13.6, https://updates.cdn-apple.com/2018/macos/091-94327-20180709-5409BA12-7C10-11E8-84CF-4F47544C24EB/macOSUpdCombo10.13.6.dmg
10.12.6, https://updates.cdn-apple.com/2018/macos/091-22859-20170719-94d0f538-695b-11e7-a542-95d5494dd6d5/macosupdcombo10.12.6.dmg
10.11.5, https://support.apple.com/downloads/DL1876/en_US/osxupdcombo10.11.5.dmg
10.10.5, https://support.apple.com/downloads/DL1832/en_US/osxupdcombo10.10.5.dmg
10.9.5, https://support.apple.com/downloads/DL1760/en_US/OSXUpdCombo10.9.5.dmg
10.8.5, https://support.apple.com/downloads/DL1676/en_US/OSXUpdCombo10.8.5.dmg