Cubase 7.5.40 Slow Response in Yosemite

Hello… I am running Cubase 7.5.40 on a MacBook Pro running Yosemite and I am getting slow response in Cubase. For example, if I enter bar 10 so the transport will move to bar 10, it hesitates and does not go immediatley to Bar 10. Also have a delay when selecting plug ins… Did not behave this way on Mac OSX Lion… Is there anything in preferences I need to update? anyone else having slow response issues with 7.5.40 and Yosemite? will things be better if I upgrade to Cubase Pro 8? thanks for the help…