A Nagios compatible plugin to check if macOS system updates are available.
``` sh
Usage: check_macos_updates [OPTIONS]
Options:
-f, --force-manual Force manual check with `softwareupdate -l` (slow)
-c, --critical-on-updates Return critical if updates are available
-h, --help Print help
-V, --version Print version
```
Use together with nrpe or similar, preferably with [Opsview](https://www.itrsgroup.com/products/infrastructure-monitoring).