When media is offline and I press 'Link Media...' I get to a panel that doesn't scale properly and is has been an issue for a long time. Most of the panel is just unusable space while looking for the offline media becomes really diffucult because the usable space in the panel is so small.
Thank you for submitting a bug report. We need a few more details to try help with the issue. What exact version of Premiere Pro and Mac OS version are you on?
Are you using any external displays and does this also happen if you right-click 'Link Media' from within the sequence timeline itself and from the the top menu File > Link Media, or only if done from within the Project panel?