Fixed in v2.7.4. Thanks!
Tested v2.7.1. No issues but noticed GUI did NOT support masOS Dark Mode. Switched to Light Mode and started v2.7.2. Values in text boxes now visible. Switched back to Dark Mode (and restarted 2.7.2) and values are NOT visible. So this has something to do with displaying values in macOS Dark Mode.
Tested v2.7.1. No issues but noticed GUI did NOT support masOS Dark Mode. Switched to Light Mode and started v2.7.2. Values in text boxes now visible. Switched back to Dark Mode (and restarted 2.7.2) and values are NOT visible. So this has something to do with rendering in macOS Dark Mode.
Textboxes within GUI appear blank