Added detction for OSX El Capitan
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Pretty sure 18.104.22.168.4.1.8072.3.2.255 is a generic one, at least it was when I was looking last time.
Think we should use the sysDescr instead.
Updated to use sysDescr
Sorry to bother again, but why not strstr?
Taken from another file, feel free to submit your own pr if you want strstr.