I'm almost certain there aren't any issues with El Capitan running on a Mid 2010 13" MacBook Pro but I thought I'd ask to be sure. It has 8 GB of RAM. The main reason I ask is it's my mom's and if she upgrades, I may not be around to help with any issues. For instance, on my mini, for some reason, I can't share anything from Safari to Facebook/Twitter/Email, etc. And I can't add those items to the share menu. I haven't bothered to look into why yet.