Similar story, I just bought old "white plastic macbook", the last revision from 2009, for 50 euro (to be used by my daughter). Turned out that it runs OS X El

Similar story, I just bought old "white plastic macbook", the last revision from 2009, for 50 euro (to be used by my daughter). Turned out that it runs OS X El Capitan (= gets security updates) and supports 8 GB of RAM. You can upgrade the 2.5" SATA HDD to SSD. Basically it's usable as a modern computer, only the 1280x800 display resolution being modest by today's standards.