I have an old MacBook running Snow Leopard 10.6.8. Specs are 2.4 GHz Intel Core Duo, 2GB RAM. I bought it for my gf (now wife) around 2008 and we have not used it in the last couple of years.
The OS and the software as a whole are rather outdated and I am most concerned about safety issues. So I would like to upgrade it and use it for some specific tasks.
Problem is: the link from the App Store to upgrade to El Capitan fails because I cannot upgrade but it doesn't tell me the reason. Space on disk is plenty (just above 36 GB).
What can I do? It would be a shame to be unable to use it. Is there some other upgrade path? Is there some other solution to make this box as usable (safely!) as possible?