upgrade 2 mac books without downloading twice
I've got 2 Mac Book Pro and would like to upgrade to El Capitan. The image seems to be 6.8 GB big. Do I need to download this big image twice or is there a way to download it once and submit it to 2 MacBooks.
Thanks,
Olaf
MacBook Pro (Retina, 13-inch, Late 2013), iOS 9