This Update provides an important fix to an error of ARCHICAD 19 Update build 4011: "199288: Snapping fails and causes wrong feedback and placement of elements in certain circumstances".
It's finally the day you can stop working and upgrade to OSX 10.11. But first make sure to backup, update ARCHICAD 18 & 19, and say goodbye to ARCHICAD 17.
These are not the updates you are looking for. Unless you use ARCHICAD 17 or ARCHICAD Solo. Sorry.
Should you upgrade tomorrow and run ARCHICAD on Mac OS X El Capitan? Absolutely not. You need to wait for the next Hotfix for ARCHICAD 18 and 19.
Your BIM application is the most important software you own. Remember that before you try using the Windows 10 or OS X 10.11 El Capitan Beta.