hi @wuhao are you by any chance using Mac OS Sonoma?
in any case, pls run _SystemInfo in Rhino and post back the results
yes，I am using Mac OS Sonoma。
systemInfo.txt (12.5 KB)
Hi -
There are breaking changes in the current beta versions of that version of macOS.
We have this on our list as RH-75678 UI problems with macOS Sonoma
-wim
Thank you，is there have plan to fix the bug？Big model need work in rhino 8. 
Hi -
You are running WIP software on a beta macOS - you really shouldn’t expect to be able to be productive in such environment.
That said, we are in touch with Apple about this and hope they can fix the incompatibility in an upcoming beta of macOS.
-wim
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