The font in the menu bar is thinner than in every other app I have installed on my mac. Even Photoshop uses the right font settings. I have a 5K iMac and it is very annoying that the font is so thin. I tried to reinstall Lightroom but this didn't help.
Please see the screenshot attached for further details.
You may need to drop your screen resolution because there's no way to change the UI scaling in Lightroom.
Please repost this on the official Adobe feedback forum, where Adobe wants all bugs, feature requests, and comments about features posted: Photoshop Lightroom | Photoshop Family Customer Community . Product developers read every post there.