macOS Sierra - Fans Going Wild just having Geogebra open.
it is becoming more or less impossible to Geogebra on a Mac if one either users the App or Safari as a Browser.
If on a Mac just creating a new window will let the fans of a 2016 MBP spin like crazy without one single formula entered.
If using Safari and logging into Geogebra, well this is a real fun experience. Dissappearing Matrix Fields, Row/Colums - entry fields vanishing etc...
I don't bother ever using Chrome nor Firefox - so please don't come with the advice that I should use those :D
Thanks for a quick fix