I am very sorry about this.
Thank you very much for downloading the macOS version and for taking the time to report the issue. I sincerely apologize that you were looking forward to playing the game, only to find that the application could not be opened.
Since I do not currently have access to a macOS device for proper testing, I will temporarily remove the macOS version from public download while I review the issue.
Your report was extremely helpful, and I truly appreciate you letting me know. I am very sorry for the disappointment and inconvenience this caused.
Thank you again for your interest in Last Blue Trace and for your kind support.