Since Lightrrom CC/6 the font in the menu bar of macOS is very thin compared to all other apps installed on the system and the preinstalled ones from Apple. Even Photoshop uses the right font like all Apple Apps does. Lightroom stands out in a weired way, because every time I switch to Lightroom the font in the menubar changes completly. I tried to reinstall Lightroom 3 times but this doesn't help. I have a 5K iMac, where these differances become more visable than on a non retina display.