From v1.8, the UI is built using SwiftUI, on macOS 15, with minimum system version macOS 14.6.
Since I haven't successfully built it with lower version of github action runner images, it is what it is now. Later if I have the chance, I would make it compatible with lower version of macOS.
Any PR for feature enhancement or compatibility improvement is welcomed!
Now this app is automatically built with github actions. So it may require some processing before running. Run the following command to make the app runnable.
sudo xattr -rd com.apple.quarantine ./NetSpeedMonitor.app