This is really bamboozling me ... I am selling a 2011 MBP to a friend. I wiped the drive and did a clean install of Sierra, leaving it at the stage where he needed to enter his credentials, iCloud info, etc, to set it up as a 'new' Mac. All went well until we discovered Pages, Keynote and Numbers were missing - I had assumed they would be part of the OS, but no ... He is a new Mac user, and has never purchased or downloaded those apps before. Therefore, in the App Store purchases tab nothing shows. The versions of the apps in the App Store are for Mojave, and won't download. So, in situations like this how does someone acquire those apps for an older OS?!