Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
You had to wait for the updated file, too 😉 Are you skipping firmware update by default?
Now the CatalogURL is there. It was there when I wrote the script. And yes. Firmware upgrades are skipped.

Note: Folks. The preferred way of installing/upgrading High Sierra it to use the App Store !!!
 
Is it only via App Store, or can I download it via Apple Developer site? I couldn't find DP5 anywhere, and I need to install it on 3 Macs and can't be bothered downloading it three times...
 
Is it only via App Store, or can I download it via Apple Developer site? I couldn't find DP5 anywhere, and I need to install it on 3 Macs and can't be bothered downloading it three times...
Once you have downloaded you can use createinstallmedia from the command line to create a USB installer, or you can copy the app installer to the computers you wish to upgrade.
 
Still getting 'Error Verifying Firmware' whilst trying to install

Late 2009 iMac 21.5" 3.33GHz Intel Core 2 Duo

Any help please?
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.