Some Check_MK tweaks

macOS support

A slightly tweaked macosx agent compared to the official one. As of 2.0.0p19 this agent has the following improvements:

reports macOS version (e.g. 10.16 (20A4299v))
reports correct size of APFS volumes
filters out temporarely appearing filesystems
reports network statistics somewhat correctly
runs ntp check only on macOS 10.12 and below since broken with newer macOS releases
runs timemachine check only on macOS 10.13 and below since broken with newer macOS releases
on recent Intel Macs reports thermals and fan speeds by using macOS' powermetrics tool
on older Intel Macs reports thermal sensors if HardwareMonitor is available or iStatistica
on Apple Silicon Macs reports thermal sensors and fan speeds if iStatistica is available
reports SMART health data and disk temperatures if smartctl is available (brew install smartmontools)
reports battery info and status
reports outstanding security updates
reports a warning if security updates require a reboot
supports HW/SW inventory (Mac/cpu/OS/devices info, serial numbers, installed apps, homebrew packages)
bundled with a LaunchDaemon that needs to be loaded as below (if you want more fine grained control who can access the agent's output see here for example):

launchctl load -w /Library/LaunchDaemons/de.mathias-kettner.check_mk.plist

It looks like this with an old MacPro having plenty of hardware sensors, running with available HardwareMonitor.app and macOS prior to 10.15:

It looks like this with a new M1 MacBook Air having plenty of hardware sensors, running with iStatistica.app and macOS 11:

The fully searchable HW/SW inventory looks like this on a MacBook Pro:

Inventory history can be used to track software changes (Apps and homebrew packages):

Some Check_MK tweaks

GNU General Public License v2.0

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