i clicked your image
and damn your screen is huge!!!
but the panels of your SAI looks the same as the sai on my computer (size wise)
im not sure if Macbook pro have this settings too
but in "display" you can set the panels, text etc to your liking
example (sorry i have windows 10)
this should be look like on mac (google image ;u;)
fiddle with the sizes and you may find the perfect size c:
hope this will fix!