It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

In the requirements I can read:
Mindestsystemanforderungen - Mac: OS X 10.9.2 or later
Empfohlene Systemanforderungen - Mac: OS X 10.12 or newer
Post edited August 27, 2018 by Lebostein