Upgrade OS 10.9.5

Wednesday March 13, 2019. 12:23 AM , from MacMost

Gary, what OS upgrade could I put in an older Mac Book Pro safely? I am using Mavericknow. Spects are: 200 GB free SATA Disk, 4GB memory, 2.4Ghz Inter Core 2 Duo.
Current OS: 10.9.5
My second question is where would I find the upgrade, if in fact this feasible?
Thank You, Ken
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Ken

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