Lately I've been noticing some strange symbols in the OSX menu bar. The icons appear next to the clock when the computer wakes from sleep and i have to put in the password. They are gone after login. I've been searching the web and couldn't find any info about them. They also appear to change on a daily basis. Yesterday it was a "plus-minus" sign, today it appears to be the Chinese symbol for gold (although im not sure). I'm running OSX 10.11.5 on a Mid-2012 15" MacBook Pro Some screenshots are attached. Does anyone have some info about this? Thanks!