Some users have experienced a graphical glitch in Pitch Edit mode in Reason 10.0.1 on Mac OSs.
The glitch makes the notes in Pitch Edit mode appear as pink boxes without any visible waveforms in them:
The pitch edit functionality is not affected by this glitch, though; you can still edit the pitches, drifts and transitions as usual and the audio will sound as expected.
Our R&D department will have a look at this first thing after the Christmas holidays. We are very sorry for any inconvenience this might cause!