Universal macOS binary (arm64 + x86_64). Requires macOS 13 or later.
The binary is unsigned, so macOS quarantines it after download.
Clearing that is the third line:
tar -xzf findphone-macos-universal.tar.gz
xattr -dr com.apple.quarantine findphone
./findphone --help
Needs Bluetooth permission for whichever terminal runs it, under
System Settings > Privacy & Security > Bluetooth.