Is there any way to further update the OS...
https://everymac.com/ultimate-mac-lookup/?search_keywords=MacBookPro5,3Maximum MacOS: X 10.11.x*
Details: *This system fully supports the last version of OS X 10.8 "Mountain Lion" as well as OS X 10.9 "Mavericks" except for "Power Nap" and "AirPlay Mirroring" (which also requires an Apple TV 2nd Gen or higher). It also supports the last version of OS X 10.10 "Yosemite" and OS X 10.11 "El Capitan" -- including Mac-to-Mac AirDrop capability -- but no other advanced features are supported. It is not capable of running macOS Sierra (10.12) or subsequent versions of the macOS at all.