Hi guys,
Not sure if this has been reported, but I’m unable to work on Desktop layout on my MacBook Pro Retina (when screen resolution is set to default)
The gird thinks I’m viewing on iPad but I have full width on Safari.
SO unable to even see Desktop or Laptop view to adjust content.
Works on on Desktop, iMac or PC with larger screen.
Try to check your browser ZOOM 
It’s not the Zoom.
Is it the same issue?
not exactly, but I can see that theirs default breakpoint starts from laptop (highlighted in blue) despite they clicking to view breakdown 1200px or UP.
Mine starts from iPad view when using my Mac Laptop despite I have full screen on Safari.
Works ok on larger screens, iMac, or Desktops.
So to clarify, blue indicates the current width of the preview frame. You can still edit the larger views and the icon of the selected breakpoint will turn white. You’ll still see a blue icon
For example, I’m on a 15" MacBook Pro and the LG breakpoint is blue and active by default. If I click to XL I can adjust the Layout, but I can’t preview it unless I collapse the Inspector with the little arrow, or undock it. This is because the 300px sidebar prevents the preview from growing past 1200px.
Let me know if this makes sense, or if I’m missing something and you’re referring to something else. Thanks!