Value Change Within a .xml file not Resulting in a Change within Civ 5 Game

I changed the value of the research speed in the Civ5GameSpeeds.xml file on mac, but when I run the game, researching costs are still at the default values. I tried restarting the game and my computer but nothing happens. I know I have permission to read & write the file too. Also I changed the values within the CIV5GameOptions.xml file to see more options successfully, but I don't know why it's not working for the CIV5GameSpeeds.xml

Here is a snippet of code

  <Row>
        <Type>GAMESPEED_QUICK</Type>
        <Description>TXT_KEY_GAMESPEED_QUICK</Description>
        <Help>TXT_KEY_GAMESPEED_QUICK_HELP</Help>
        <DealDuration>25</DealDuration>
        <GrowthPercent>67</GrowthPercent>
        <TrainPercent>67</TrainPercent>
        <ConstructPercent>67</ConstructPercent>
        <CreatePercent>67</CreatePercent>
        <ResearchPercent>200</ResearchPercent> <!-- User changed original value of 67 to 200 -->
        <GoldPercent>67</GoldPercent>
        <GoldGiftMod>125</GoldGiftMod>
        <BuildPercent>67</BuildPercent>
        <ImprovementPercent>67</ImprovementPercent>
        <GreatPeoplePercent>67</GreatPeoplePercent>
        <CulturePercent>67</CulturePercent>
        <BarbPercent>67</BarbPercent>
        <FeatureProductionPercent>67</FeatureProductionPercent>
        <UnitDiscoverPercent>67</UnitDiscoverPercent>
        <UnitHurryPercent>67</UnitHurryPercent>
        <UnitTradePercent>67</UnitTradePercent>
        <GoldenAgePercent>80</GoldenAgePercent>
        <HurryPercent>100</HurryPercent>
        <InflationPercent>45</InflationPercent>
        <InflationOffset>-60</InflationOffset>
        <VictoryDelayPercent>67</VictoryDelayPercent>
        <IconAtlas>GAMESPEED_ATLAS</IconAtlas>
        <PortraitIndex>3</PortraitIndex>
    </Row>