I run an ecommerce business so I mostly use my computers for that. I have the following, both of which need an upgrade: Mid 2010 Macbook Pro Intel 2.4 GHz Core 2 Duo Upgraded to 4mb RAM Upgraded HD to Crucial BX-100 500GB SSD And an iMac Late 2012 21.5 iMac 2.7 GHz i% 8gb RAM 1TB SSD Both are slow, mostly the MBP though. I have back problems so I would much rather use a laptop in a more cozy setting to get work done. My dilema.... Do I upgrade or buy new? I bought 2x 4GB RAM (DDR3 1066) from a local shop.. Did not work. I can install it with 1x 4GB stick and 1x 2GB stick. Otherwise it boots with the Apple logo getting halfway through the progress bar and stalls. I know the RAM is not defective as I've had both sticks working... now when I look at my MBP with 6GM RAM it says 6GB 1067 DDR3... why is this?? Since my SSD is old, I went ahead and bought a 128GB Samsung 850 PRO. I plan on running a fresh install as most of the files that filled my 500GB are not needed, (movies and such). My battery is also just about shot, and my glass is broken (not the actual screen) so I was going to replace that as well. I am looking at the 12" Macbooks as they are sleek and seem to do what is needed. Now onto my questions.. Do I return the RAM and SSD (cost about $150) and just buy a new one? I will want to replace the glass.. and need a new battery soon as well. I only plan on using it for website, photo editing, ect. Basic tasks mostly, but both of my computers are sluggish at doing just that. I am worried 8GB RAM is not enough. I also run VMWare sometimes and that kills my RAM. Or if I have a few programs running 8GB goes quickly. I've heard conflicting reports of my MBP working with 16GB RAM..any experience with this? It is the 7,1 version which seems to be the one that works. Sort of confused here as to what to do. I need a strong machine that I can do web design, ecommerce, and all my stuff.