I just got my hands on a MacBook Pro mid-2009 thats in very good condition. I've decided to to upgrade it as much as possible (as per advice I've received on these forums) as it's very slow. Specs are: MacBook Pro 13" mid-2009 Processor 2.53 GHz Intel Core 2 Duo Memory 4GB 1067 MHz DDR3 Graphics NVIDIA GeForce 9400M 256MB OSX El Capitan (10.11.6) I want to upgrade the HDD to an SDD, and I'll put in as much RAM as possible (there are 2 RAM slots (see attached) ... can this machine take 8GB?). I'm also thinking about replacing the battery (current health is less than 50%). I have a few recommendations from another thread, but I thought this topic deserved a separate thread in case anyone else is thinking of doing something similar. So, can anyone recommend the best SDD, RAM and battery please? I've already had recommendations (thanks to MSastre) for Crucial for both SSD and RAM. I've also been recommended the Samsung 850 EVO 250 GB 2.5 inch SSD. MSastre also suggests that replacing the battery is easily done ... use OWC. Should I stick with El Capitan as this is the last "officially supported" OS for the MacBook Pro 2009? I'm based in Ireland, but happy to see recommendations for US and Euro based suppliers. I think the actual hardware is more important than the supplier is this is to be a good reference thread for anyone pimping up an old MacBook Pro. Thanks in advance.