After I installed Xcode 8 beta 6 I immediately realised that the text is very aliased. Even though it is of minor importance, I want it to be anti aliased. Zoom into the image and you will see that it is clearly choppy and aliased.
My MacBook Pro 13" is currently running on MacOSX El Capitan 10.11.6 Xcode 8 Beta 6
Ok, so i found the answer to my question:
defaults write com.apple.dt.Xcode NSFontDefaultScreenFontSubstitutionEnabled -bool NO
just paste that into the Terminal :D