Hi, thanks for the report! The freeze is a known bug: when the LVGL preview crashes, the input blocker we show during a rebuild can stay on screen, so the whole UI stops accepting clicks with no error message. We’ve fixed it internally and it will be in the next release. On macOS 1.6.2 the crash behind it usually comes from an LVGL 8.3 project that has a widget sized to “content” (see Problem after upgrading to 1.6.2 ) — 1.6.1 avoids it for now.
Could you tell us your Studio version, the project’s LVGL version, and whether the Console panel shows a red “LVGL crashed” line before it freezes?
The UI zoom is separate: the first-run default scale is picked from the screen resolution and doesn’t translate well to Retina, so a Mac starts at a different scale than a PC. You can change it under Preferences → UI scale.