Been using my dad's MacBook from 2009 (that he had obtained from a pawn shop long ago) as a secondary laptop. Had tried to update the existing OS, but it was too old, Apple had already abandoned it, so I installed Linux Mint XFCE. Now it's modern again. Slow as hell for some tasks like browsing the web, but it's the memory that's the bottleneck, planning to go from the stock 2GB to 4GB or 8GB soon, which will fix that, possibly another SSD later too.