Hi Stefan,
If you missed them, there have been several posts recently in the Snow Leopard threads about fonts appearing as rectangles. Some of the problem fonts are listed there, and some have been summarized in the archicadwiki Snow Leopard page.
The only solution I've seen so far has been 'use another font'. Of course, you don't have that option for the Ecotect interface. (By the way: are you talking Ecotect, as in your text, or Ecodesigner, as in your subject? I have no problems with the Ecodesigner fonts - interface or output.)
Perhaps there is a plist or other preference file that you can find that you can edit to change the default font used?
Regards,
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB