Describe the bug

Recent versions of ROOT's TBrowser on MacOS do not display the geometry tree correctly. In particular, volume names are missing.

Expected behavior

I expect volume names to be displayed correctly. This is working correctly in version 6.22.

To Reproduce

Steps to reproduce the behavior:

1. root geometryfile.root
2. new TBrowser
3. click on the volume hierarchy

Setup

1. ROOT version 6.26 (wrong); ROOT version 6.22 (ok)
2. MacOS
3. brew install or manual compile

Additional information:

attaching screenshots demonstrating correct (6.22) and wrong (6.26) behaviour using the same
geometry file.