Mid 2012 13" MacBook Pro (MacBookPro9,2) i5 best OS

Hey I got this laptop a bit ago and it's been working really well. I've already upgraded to an SSD and 16GB DDR3, and I've done patching before on a 2008 MacBook. I was wondering if anyone had any recommendations for the highest OS to get this up to?

submitted by /u/sampseth
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