Currently just a slightly tweaked macosx agent (filters out temporarely appearing filesystems, reports compressed memory as swap, reports some thermal sensors) plus LaunchDaemon. Needs

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

for activation.

For CPU temperature working you need osx-cpu-temp in /usr/local/bin (tested successfully on 2 Mac Mini). For more thermal sensors you need Marcel Bresink's HardwareMonitor. Then it looks like this with an old MacPro: