Hey everyone! I’m Rob and I lead product on our Desktop App.
We’re really sorry people are experiencing issues with this. Sadly this is an upstream change from Apple and Google around Xcode and Chromium that is outside of our control.
We are also unable to provide warnings before updates as we can’t encourage using unsupported versions of Figma for a number of reasons.
I would suggest people experiencing this issue either update their OS version, or continue using Figma in the browser. We’re aware that this means custom fonts may not be supported, but sadly we aren’t able to provide workarounds at this time.
Again we’re so sorry about this, but sadly there is nothing we can do at this time.