Yea sorry for being salty and I can only say that it is absolutely not meant to be personal, but, you know the constellation of hardware (gpu vs monitor) plus the strange setting of adding only mods that only add gpu load (and then on top especially these that add shader AND texture load - again, 2GB mobile with half the memory amount and half the bandwith of a regular 290 card, only 80 TMUs instead of 176, 1280 shader units instead of 2816 @5K) with the unusual 15 part ship. This is a strange constellation especially as every KSP player should have seen that KSP 1.0.5 and below suffered from partcount. There is even a ultra old and widely used mod to cure this issue in the form of the welding tool.
EDIT:
disable Vsync (or turn on triple buffering - if supportet on a mac) (this will avoid capping fps to integer divisions of your refresh rate (60-30-15))
reduce resolution (to free GPU resources)
reduce FSAA (to free GPU resources)
disable scatterer (to free GPU resources)
remember: the most benefits of 1.1 will bee seen with high part count scenes.
InsaneDruid's post in 1.1's "massive" performace improvement was marked as the answer